U.S. Route 101 in California
U.S. Highway in California
From Wikipedia, the free encyclopedia
U.S. Route 101 (US 101) is a north–south United States Numbered Highway that runs between Los Angeles, California, and Tumwater, Washington. U.S. Route 101 in California covers approximately 808 miles (1,300 km) between the East Los Angeles Interchange and the Oregon border, making it the longest numbered route in California’s highway network.
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routes
U.S. Route 101 | ||||
|---|---|---|---|---|
US 101 highlighted in red | ||||
| Route information | ||||
| Maintained by Caltrans | ||||
| Length | 808.111 mi[1] (1,300.529 km) Portions of US 101 relinquished to or otherwise maintained by local or other governments are not included in the length | |||
| Existed | November 11, 1926[2][3]–present | |||
| Tourist routes | ||||
| Restrictions | STAA trucks are prohibited through Richardson Grove State Park[6][7] | |||
| Major junctions | ||||
| South end |    I-5 / I-10 / SR 60 in Los Angeles | |||
| ||||
| North end |  US 101 at the Oregon state line near Brookings, OR | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Los Angeles, Ventura, Santa Barbara, San Luis Obispo, Monterey, San Benito, Santa Clara, San Mateo, San Francisco, Marin, Sonoma, Mendocino, Humboldt, Del Norte | |||
| Highway system | ||||
| ||||
US 101 is a critical freeway in Greater Los Angeles and the San Francisco Bay Area; it is also a communal highway in the Central and North coasts, where it connects cities such as Santa Barbara, San Luis Obispo, Salinas, and Eureka. The Los Angeles portion of US 101 is one of the most congested freeways in the U.S. based on multiple studies. In the Central Coast, US 101 is a mix of freeway and expressway, while the North Coast segment is mostly a two-lane road with pockets of controlled-access configurations. The majority of the route is maintained by the California Department of Transportation (Caltrans).
US 101 was created in 1926, its route taking over or sharing paths with El Camino Real, Redwood Highway, and State Legislative Routes 1 and 2. US 101 originally continued south from Los Angeles, through Orange County and San Diego to the Mexican border, but this segment was switched to Interstate 5 (I-5) in 1964. Beginning in the 1930s, numerous US 101 segments were replaced or relocated, often to bypass smaller cities. In the 1940s and 1950s, many segments were upgraded to freeway standards, particularly in Southern California, San Jose, and along the San Francisco Peninsula. However, freeway upgrades were curtailed in the 1960s, and while a few sections have been upgraded since then, segments now are more commonly improved without being fully upgraded to freeway standards. In 2024, the Wallis Annenberg Wildlife Crossing, the world's largest wildlife crossing, began construction across US 101 in Ventura County. Proposed improvements yet to be implemented include two freeway caps in Los Angeles, trucking upgrades through Richardson Grove State Park, a 6,000-foot (1,800 m) tunnel in Del Norte County, and the addition of high-occupancy lanes in several areas.
US 101 and many of its features are known by various names. California residents generally refer to the route as "101" or "the 101" (pronounced "one-oh-one"), while segments in Los Angeles are variously named Santa Ana Freeway, Hollywood Freeway, and Ventura Freeway, and segments in the Bay Area are named South Valley Freeway, Bayshore Freeway, and Central Freeway. US 101 south of the Bay Area has been dedicated as El Camino Real, north of the Golden Gate Bridge as Redwood Highway, and the entire route is named both Blue Star Memorial Highway and Coast Highway. Several memorial and tourist designations have been applied to sections of the route. Segments of US 101 that run concurrently with California State Route 1 (SR 1) are also known as Pacific Coast Highway, sharing the name of that route.
Route description
US 101 runs for 808 miles (1,300 km) in California, making it the longest numbered route in the state.[8] It is named Route 101 in Section 401 of the California Streets and Highways Code and defined as:[9]
Route 101 is from:
(a) Route 5 near Seventh Street in Los Angeles to Route 1, Funston approach, and, subject to Section 72.1, the approach to the Golden Gate Bridge in the Presidio of San Francisco via Santa Barbara, San Luis Obispo, and Salinas.
(b) A point in Marin County opposite San Francisco to the Oregon state line via Crescent City.
The definition purposely omits the segment crossing the Golden Gate Bridge, as it is maintained by the Golden Gate Bridge, Highway and Transportation District and is not part of the state highway system. Despite this, U.S. Route logs from the American Association of State Highway and Transportation Officials include the bridge as part of US 101, as do most other maps.[10] The bridge, along with the rest of US 101, is also part of the National Highway System.[11]
US 101 is part of the California Freeway and Expressway System,[12] and portions of it are eligible for inclusion in the State Scenic Highway System.[13] It is officially designated a scenic highway between Goleta and Las Cruces in Santa Barbara County[4] and through Del Norte Coast Redwoods State Park in Del Norte County.[5]
Southern California
US 101 begins in Boyle Heights at the East Los Angeles Interchange, a major freeway junction that includes I-5, I-10, and SR 60. The six-lane portion of the route is the northerly continuation of the Santa Ana Freeway, inheriting that name from I-5. After two miles (3.2 km), US 101 turns west at the San Bernardino Split, a three-way junction with the San Bernardino Freeway that transitions into I-10 to the east. US 101 travels across the Los Angeles River before passing Los Angeles Union Station.[14]
Proceeding in a generally northwestern direction, US 101 travels through downtown Los Angeles via the Downtown Slot[15] between the Los Angeles Civic Center and El Pueblo de Los Ángeles, then intersects with SR 110 at the Four Level Interchange. Starting here, US 101 is named Hollywood Freeway. It bisects Echo Park, Silver Lake, Los Feliz, and Hollywood, passing Echo Park Lake, the Hollywood Boulevard Commercial and Entertainment District, and the Hollywood Bowl in the process. SR 2 has a short concurrency with the freeway within the area. North of Hollywood, US 101 traverses the Santa Monica Mountains via the Cahuenga Pass before entering the San Fernando Valley. It then passes Universal Studios Hollywood, after which it turns westward at the Hollywood Split, where it supersedes SR 134 on the Ventura Freeway while the Hollywood Freeway continues north as SR 170.[14]
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From the Hollywood Split, US 101 runs east–west despite its north–south designation. Because of this, the same freeway entrance can be signed as US 101 North and US 101 West or US 101 South and US 101 East; this is most common in the San Fernando Valley where local signage does not match the Caltrans' statewide designation.[16] Along this segment, US 101 intersects with I-405 in Sherman Oaks and SR 27 in Woodland Hills. In Calabasas, US 101 changes from heavily urbanized to a more rural character as it enters the Conejo Valley, where it transitions from Los Angeles County into Ventura County.[17] In Thousand Oaks, US 101 and SR 23 run concurrently for about 2.5 miles (4.0 km), between Westlake Boulevard and a three-way interchange with the Moorpark Freeway.[14]
Continuing westward, US 101 climbs the Conejo Grade on a 7% incline[18] before descending into the Oxnard Plain, where it has interchanges with SR 34 and SR 232 in Camarillo and Oxnard, respectively.[19] Likewise in the latter city, SR 1 runs concurrently with US 101.[a] Upon crossing the Santa Clara River, the highway enters Ventura, where it intersects with SR 126 and SR 33 on separate junctions.[14]
Central Coast
The US 101/SR 1 duplex crosses the Ventura River at Emma Wood State Beach, at which point it borders the Pacific Coast for 12 miles (19 km) until Rincon Point; of this, the two routes run alongside rather than concurrent for 7.5 miles (12.1 km), with the non-concurrent section of SR 1 routed on Rincon Parkway. The highway also passes through Faria, Mussel Shoals, and La Conchita along this stretch. After reaching Santa Barbara County, it intersects with SR 150—at this point, the Ventura Freeway name ends. US 101/SR 1 continues through Carpinteria, then returns to the coast for two miles (3.2 km), passing through Summerland before entering Santa Barbara.[14]
US 101/SR 1 bisects the entire length of Santa Barbara, with an interchange at SR 154. In Goleta, the highway has a junction with SR 217 that connects to University of California, Santa Barbara.[14] West of Goleta, the routes narrow from six lanes to four and switch from freeway to expressway,[b] then straddle a 19-mile (31 km) stretch of the Gaviota Coast, again often directly overlooking the shore.[14][17]
At Gaviota, the highway curves sharply north and reverts to its original north–south orientation. It heads inland across the Santa Ynez Mountains via the Gaviota Pass, where northbound lanes pass through the Gaviota Tunnel—no tunnel exists in the southbound direction. About 1.5 miles (2.4 km) north of the Gaviota Tunnel, SR 1 splits from US 101 to resume its role as California's primary coastal highway.[14] Throughout the rest of the Central Coast, US 101 switches between freeway and expressway status,[17] but despite occasional cross-traffic it has unimpeded traffic, as there are no stop signs or traffic signals until San Francisco.[22]
North of the US 101/SR 1 split, US 101 reaches Buellton, where it intersects with SR 246. North of Buellton, US 101 intersects SR 154 again, and in Los Alamos, it intersects SR 135. In Orcutt, US 101 and SR 166 run concurrently for three miles (4.8 km) until north of Santa Maria, where US 101 again intersects with SR 135. Vineyards surround US 101 in much of this area.[14]
In San Luis Obispo County, US 101 passes through Nipomo, then intersects with SR 227 in Arroyo Grande. US 101 and SR 1 form another concurrency in Pismo Beach. Thereafter, the highway turns inland to San Luis Obispo, where US 101 reconnects with SR 227, and SR 1 splits off again.[14] North of San Luis Obispo, US 101 ascends the Santa Lucia Range on a 7% incline via the Cuesta Grade, cresting at 1,522 feet (464 m) before descending north of the range.[23] After the grade, US 101 has an interchange with SR 58 near Santa Margarita, and another with SR 41 in Atascadero. US 101 next passes through Templeton, and upon exiting, it runs concurrent with SR 46 for about three miles (4.8 km) until Paso Robles. US 101 continues north through San Miguel, where it enters Monterey County inside Camp Roberts.[14][17]
North of Camp Roberts, US 101 passes the San Ardo Oil Field about five miles (8.0 km) south of San Ardo. Between San Lucas and King City, US 101 crosses the Salinas River three times and also intersects SR 198.[14] US 101 then enters the Salinas Valley, known as America's Salad Bowl,[24] where it travels through Greenfield, Soledad, Gonzales, Chualar, and Spence. US 101 then enters Salinas, where it has junctions with SR 68 and SR 183. North of Salinas, US 101 and SR 156 run concurrently for approximately eight miles (13 km). Within San Benito County, SR 156 splits off near San Juan Bautista, after which US 101 intersects with SR 129.[14] US 101 also crosses the San Andreas Fault in this area.[25]
San Francisco Bay Area
US 101 crosses the Pajaro River watershed into Santa Clara County,[26] San Francisco Bay Area's southernmost county.[27] US 101 then intersects SR 25, then continues north to Gilroy, where it changes from expressway to freeway. US 101 and SR 152 run concurrently for one mile (1.6 km) in this area; after which US 101 passes near San Martin and Morgan Hill in the Santa Clara Valley.[14]
US 101's surroundings become increasingly urbanized as it approaches San Jose, where it intersects with SR 85.[17] US 101 bypasses downtown San Jose to the east, passing through largely residential areas and also intersecting with I-280 and I-680 at the Joe Colla Interchange. US 101 then turns northwest as it continues through San Jose and intersects with I-880, then has a partial junction with SR 87. In Sunnyvale, US 101 intersects with SR 237 and SR 85, the latter for the second time. US 101 continues northwest through the South Bay, passing the Silicon Valley campuses of several major technology corporations, including IBM, Intel, Nvidia, and Google.[14]
US 101 enters the San Francisco Peninsula at Palo Alto, where it travels along the western edge of the San Francisco Bay. The route enters San Mateo County in East Palo Alto, where it intersects with SR 84, then passes through Redwood City, Belmont, and San Carlos. US 101 intersects with SR 92 in San Mateo, and in San Bruno, it passes San Francisco International Airport, with direct ramp and flyover connections between the freeway and airport terminals. US 101 intersects with I-380 north of its airport connections, then traverses the east side of South San Francisco.[14] Here, the scenery briefly becomes more natural as the freeway passes Brisbane east of San Bruno Mountain, at one point traveling on a causeway that separates Brisbane Lagoon from the San Francisco Bay.[28] US 101 also passes Bayview Park, the former location of Candlestick Park, in this area.[29][14]
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US 101 enters the city and county of San Francisco at Bayview Park, after which it again intersects with I-280, this time via the Alemany Maze.[14] North of this, US 101 traverses a three-way interchange with the western terminus of the San Francisco Skyway, the latter of which is signed as I-80 but not defined as such.[30] US 101 turns west at the interchange and follows the old Central Freeway viaduct near San Francisco's Civic Center before transitioning to a surface street on Van Ness Drive. There, MUNI bus lanes traverse the middle of the alignment, which passes the rear of San Francisco City Hall. US 101 turns west on Lombard Street, then northwest on Richardson Avenue where it passes the Palace of Fine Arts, after which it continues onto the grade-separated Presidio Parkway. Within the Presidio of San Francisco, US 101 passes through the Main Post and Battery tunnels,[31] then turns northwest as it and SR 1 join near Crissy Field. The shared highway crosses the Golden Gate Bridge.[14]
North of San Francisco, US 101/SR 1 enters Marin County in the North Bay as Redwood Highway.[32][20] The route bypasses Sausalito on the Waldo Grade via the Robin Williams Tunnel, then descends to Richardson Bay, where US 101 and SR 1 split again. US 101 continues north post-split, where it enters Mill Valley and connects with SR 131. US 101 continues through the twin towns of Corte Madera and Larkspur. In San Rafael, it partially intersects with I-580 and travels just east of downtown. Farther north, US 101 intersects with SR 37 in Novato before traveling through sparsely populated areas alongside Olompali State Historic Park.[14][33]
North of Olompali, US 101 enters Sonoma County,[14] where vineyards again frequently surround the freeway.[34] US 101 and SR 116 run concurrently between Petaluma and Cotati, after which US 101 continues north through Rohnert Park. In Santa Rosa, US 101 has a junction with SR 12 and passes over Railroad Square via the Robert L. Bishop Memorial Bridge.[20] The freeway then passes through Windsor and crosses the Russian River in Healdsburg. It parallels the river through Alexander Valley, where it traverses the western hills and overlooks the wine-growing valley. US 101 then passes through Geyserville, from which SR 128 follows the freeway until Cloverdale.[14]
Northern California
Leaving the Bay Area, US 101 crosses the Russian River about one mile (1.6 km) north of the Mendocino County line. The route then changes to an expressway before flanking the river channel.[14] Inside the canyon, the route passes Frog Woman Rock, a massive rock feature central to local Pomo lore.[35] The route then enters Sanel Valley, where it narrows to a two-lane road and crosses the Russian River once more. In Hopland, US 101 intersects with SR 175.[17][14]
North of Hopland, US 101 widens to a four-lane freeway as it approaches Ukiah, where it intersects SR 253 and SR 222. In Calpella close to Lake Mendocino, US 101 and SR 20 merge and run concurrently for 15.5 miles (24.9 km),[14] ascending the 1,956-foot (596 m) Ridgewood Summit, US 101's highest elevation in California, in the process.[36] US 101 and SR 20 separate south of Willits, where SR 20 travels through the town while US 101 bypasses it to the east.[14]
US 101 intersects with SR 162 north of Willits before reaching Laytonville inside Long Valley. US 101 traverses the 1,796-foot (547 m) Rattlesnake Summit,[36] after which it follows the South Fork Eel River. In Leggett, US 101 and SR 1 meet for a fourth and final time, this time at an at-grade intersection. US 101 then follows the South Fork Eel River on a series of sharp curves into Piercy, where it crosses the river via the Confusion Hill Bridges and then enters Cooks Valley. SR 271 closely parallels US 101 for two sections of this route: between Cummings and Legget, and Piercy and Cooks Valley;[14] these sections were the old alignment of US 101.[37]
US 101 enters Humboldt County at Cooks Valley,[14] then bisects Richardson Grove State Park, where standard-sized trucks in compliance with the Surface Transportation Assistance Act of 1982 are prohibited.[6][7] From Benbow, US 101 parallels Avenue of the Giants (a preserved portion of the route's original alignment) for more than 30 miles (48 km), during which both routes travel through Myers Flat, Weott, and Redcrest, while US 101 bypasses Phillipsville, Miranda, and Pepperwood. Both routes also straddle the eastern boundary of Humboldt Redwoods State Park.[14][38]
North of Avenue of the Giants, US 101 crosses the Eel River three times as it travels through Stafford, Scotia,[38] and Rio Dell.[14] Beyond Rio Dell, US 101 crosses the Van Duzen River, then intersects with the western terminus of SR 36. US 101 continues north to Fortuna, then passes through Humboldt Bay National Wildlife Refuge, Humboldt Hill, and Fields Landing. Coming into Eureka, US 101 parallels North Bay Channel before transitioning to a surface street. US 101 continues north past Fort Humboldt State Historic Park, then turns east on a one-way couplet through downtown, where it intersects with SR 255. As the couplet ends east of downtown, US 101 becomes an unobstructed highway as it crosses the Freshwater Slough via Eureka Slough Bridge. The route then curves around Arcata Bay, leaving Eureka in the process. It travels north through Arcata, where it intersects with SR 255 again, then intersects with SR 299.[17]
Continuing north, US 101 passes McKinleyville on a bluff north of the Mad River, then crosses Big Lagoon north of Trinidad. Thereafter, US 101 narrows to two lanes and follows a bar between the Freshwater Lagoon and the Pacific Ocean. At Orick, the route turns inland and becomes a 14-mile (23 km) undivided freeway through Redwood National and State Parks east of Prairie Creek Redwoods State Park.[17]
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US 101 continues north into Del Norte County, where it crosses the Klamath River before entering Klamath.[14] Further north, US 101 traverses Last Chance Grade[39] as it approaches Crescent City, wherein it separates into a one-way couplet for nine blocks. North of Crescent City, US 101 turns northeast and becomes a freeway for three miles (4.8 km). The freeway intersects with the southern terminus of US 199 before continuing northward as a two-lane road through the eastern outlying area of Fort Dick. US 101 then crosses the Smith River and enters the town of the same name. The route then returns to the coast, where it continues on a northerly bearing past Pelican State Beach and enters Oregon.[14]
HOV lanes
US 101 contains peak-hour high-occupancy vehicle (HOV) lanes between La Conchita and Carpinteria, with an extension from Summerland to Santa Barbara under construction as of 2026[update].[40] HOV lanes are also being considered for a 27-mile (43 km) stretch between SR 23 and SR 33 in Ventura County.[41]
In the Bay Area, part-time HOV lanes have been built sporadically along US 101.[42] The HOV lanes in the North Bay are the second longest in California,[43] with a contiguous length of about 52 miles (84 km) between the Richardson Bay Bridge and Windsor.[44][45][c] In San Francisco, the right lanes of US 101 on Lombard Street have been designated temporary HOV lanes in a pilot project launched by the San Francisco Municipal Transportation Agency in 2021.[46]
Tolls
US 101 features high-occupancy toll (HOT) lanes between I-380 in San Bruno and SR 237 in Mountain View,[47][48][49] with plans to extend them to I-880 in 2026.[50] HOT lanes in Santa Clara County are co-administered by the Santa Clara Valley Transportation Authority, while the segment in San Mateo County is co-administered by the San Mateo County Express Lanes Joint Powers Authority.[51]
As of January 2026[update], HOT hours are weekdays between 5:00 a.m. and 8:00 p.m.; outside these hours, they are free and open to all vehicles. Solo drivers are tolled using a congestion pricing system based on real-time traffic levels; two-person carpools are charged half the posted toll and motorcycles and three or more carpools not charged at all. There are no toll booths to receive payment; instead, all tolls are collected using an open road tolling system. Each HOT vehicle is required to carry a FasTrak Flex transponder set to indicate the number of occupants. Solo drivers are also permitted to carry the FasTrak standard tag for access. Drivers without any transponder will be assessed a toll violation, even if they qualify to use the lane for free.[51][52]
Tolls are also collected for southbound traffic on the Golden Gate Bridge. All-electronic tolling is used and can be paid by either a FasTrak transponder or license plate tolling. The HOV lane leading to the bridge requires three or more riders.[53]
Congestion
US 101 in Los Angeles is known for its congestion, which is often amongst the worst in the United States. A 2004 American Highway Users Alliance (AHUA) study found the US 101/I-405 interchange to be the most congested interchange in the nation,[54] a 2015 Auto Insurance Center study found US 101 between downtown Los Angeles and Woodland Hills to be the most congested freeway in the nation,[55] and a 2020 INRIX study found US 101 between SR 110 and SR 134 to be the second most congested corridor in the nation.[56]
US 101 also has significant congestion along the San Francisco peninsula. A 2002 AHUA study found the US 101/I-880 interchange to be the 21st most congested in the nation,[57] and in 2016, the Metropolitan Transportation Commission determined US 101 northbound in San Francisco County and southbound in Santa Clara County were the first and third most congested freeways in the Bay Area.[58]
History
Precursors
El Camino Real
Long before California entered statehood, 16th-century Alta California had a loose-knit network of transportation paths deemed by the monarchy of Spain as caminos reales, or "royal roads".[59] In the late 18th century, Gaspar de Portolá, under the stewardship of Junípero Serra, led Spanish missionaries on two expeditionary runs in the coastal regions; missions, pueblos, and presidios were also established between San Diego and Monterey during this time.[60] Six years after Portolá's last expedition, Juan Bautista de Anza followed Portolá's trail from present-day Los Angeles to the Presidio of San Francisco.[61] George Wharton James coined the phrase "El Camino Real" for the road that the expeditions traced out in his 1908 travelogue Through Ramona's Country.[62][63]
Despite modest improvements in the mid-19th century, El Camino Real was difficult for stagecoaches and freight wagons to navigate.[64] The movement to preserve and memorialize El Camino Real began in 1902, when Anna Pitcher of Pasadena presented a plan to restore the route.[65] Later that year, the California Federation of Women's Clubs adopted the project; government agencies and other organizations supported it as well.[66] In 1904, the Los Angeles Chamber of Commerce formed a convention to support the project;[67] a second convention was held in Santa Barbara that same year.[68][69] The first distinctive bells marking El Camino Real were erected in 1906[70][71] and in 1915, the Automobile Club of Southern California produced a map detailing El Camino Real and the missions.[72]
El Camino Real was part of the Pacific Highway, a chain of highways that existed until 1926.[73] In 1924, a roadway that would eventually become part of US 101 replaced an outdated segment of El Camino Real in Ventura;[74] the replaced segment was later re-signed as SR 1.[75] In 1963, all of El Camino Real was codified in the California Streets and Highways Code[76] and also declared California Historical Landmark No. 784;[77][78] the state assumed maintenance of El Camino Real's bell markers that same year.[79]
Redwood Highway
Redwood Highway | |
 Redwood Highway c. 1930s | |
| Nearest city | Klamath, California |
|---|---|
| Built | 1900–1949 |
| NRHP reference No. | (%d+) (increase) (%d+) (decrease) |
| Added to NRHP | December 17, 1979 |
Prior to the 20th century, almost all commerce on the Redwood Coast was done by sea, whereupon ships would dock at portside towns to transport passengers and deliver and receive goods.[80][81] Amid the backdrop of a sprawling automobile industry, locals and logging companies called for a reliable highway north of the Golden Gate, as at the time, travel by motorcar across these regions could take days.[82][83] In 1910, the California government passed the State Highway Bond Act, authorizing funds for a statewide road system.[81][84]
Construction of Redwood Highway began in Del Norte County in 1917,[84] with another section constructed on tidal wetlands bordering Humboldt Bay between 1918 and 1919.[85] In 1921, Crescent City hotelier A. D. Lee proposed the name Redwood Highway to honor Save the Redwoods League and their work preserving redwood forests in the area.[86] Local communities and the city of San Francisco endorsed the proposal,[87] which was adopted in 1957.[88] The California Highway Commission also set stringent limits on the number of trees that could be cleared during the highway's construction,[84] while the trees that were cut down were often used as guardrails, drainage control devices,[89] or to build a 4,000-foot (1,200 m) trestle over Big Lagoon, at the time the largest native wood structure in the state highway system.[90] Ultimately, increased awareness of the destruction of the redwoods led to the establishment of Redwood National Park.[91]
Landslides and washouts repeatedly frustrated progress on Redwood Highway,[92] with overall construction lasting about nine years, during which the highway opened segment by segment. The highway excluding a bridge across Klamath River was complete by the end of 1923;[93] the final bridge, Douglas Memorial Bridge, was dedicated on May 17, 1926,[94][95] and the full highway opened on October 29.[96][97] To boost tourism in the area, the Redwood Highway Association marketed the highway's beauty,[98][99] most successfully with the internationally publicized 480-mile (770 km) Redwood Highway Marathon, held in 1927 and 1928.[100][101] The National Automobile Club also surveyed a split route for Redwood Highway in 1928,[102] but it was not adopted.[103]
Hollywood Freeway
In 1924, Los Angeles voters backed the Major Traffic Street Plan to address the city's worsening traffic. A "stop-free express highway" between downtown Los Angeles and the San Fernando Valley via the Cahuenga Pass was included in the plan, and the city acquired many residential and commercial properties to make room for it.[104][105]
Creation
The American Association of State Highway Officials announced its intent to establish US 101 in California in 1925.[106] The highway was originally envisioned to run for 935 miles (1,505 km) between the Mexican border at Tijuana and the Oregon state line south of Brookings, aligning with the future Hollywood Freeway as well as State Legislative Routes 1 and 2[107] and also occupying El Camino Real and all but the Crescent City–Grants Pass section of Redwood Highway (which would be designated US 199). With this alignment, US 101 would be the westernmost route in the United States Numbered Highway System.[108] Although the three-digit number in US 101 ran afoul with the system's numerical conventions, it was selected for being the next available odd number west of US 99, on the condition that the numeral 101 is treated as two digits instead of three: a 10 and a 1.[109] The US 101 designation was approved on November 11, 1926, with its routing in California mostly unchanged from its conceptual phase.[110][111][d]
US 101's traffic signs were erected by the Automobile Club of Southern California in Southern California and California State Automobile Association in the north. The first signs were placed along the San Diego–Los Angeles segment in January 1928, with the rest placed that summer.[112]
Mexican border to Los Angeles
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At its inception, US 101 traversed San Diego suburbs on Beyer Boulevard in San Ysidro, Broadway in Chula Vista, and National City Boulevard in National City.[113] From there, the route took an erratic path through the city, coming within a few blocks of Balboa Park before turning west and traveling through downtown, then turning north onto India Street. North of Mission Bay, US 101 turned west through Pacific Beach, before turning back north on La Jolla Boulevard and serving the business areas of La Jolla. By the 1940s, however, the downtown section was truncated onto Harbor Drive close to the San Diego Bay[114] and the La Jolla segment rerouted inland on Rose Canyon Road.[115][116]
In Del Mar, US 101 aligned with the Torrey Pines bypass, built in 1933 to avoid a dangerous highway that predated federal designations;[117] at opening, it was dubbed "Million Dollar Highway" for the cost of construction (amounting to $19.2 million in 2024).[118][119] Likewise in the area, the route traversed the Surf Line and Los Peñasquitos Creek estuary via bridges.[120][121] Afterward, it continued along the Pacific Coast through Solana Beach, Encinitas, Carlsbad, and Oceanside.[122][123]
US 101 continued past Marine Corps Base Camp Pendleton, where it entered Orange County and passed through San Clemente. At Doheny Park north of San Clemente, US 101 originally split into two routes, with US 101 Alternate serving the beachside cities before converging with the main route in Oxnard.[124] The main branch route veered inland through San Juan Capistrano, Laguna Niguel, and Mission Viejo, after which it zigzagged through Irvine and Tustin,[125] with a concentrated section in the latter once containing the Tustin Garage and up to ten fuel stations for motorists traveling from the south.[126] North of Tustin, US 101 followed Katella Avenue and Spadra Road,[127] then passed through southeastern Los Angeles County on Montebello Boulevard and entered Los Angeles on Whittier Boulevard.[128]
Due to increased traffic, US 101 between Carlsbad and Oceanside was upgraded to freeway standards in the 1950s.[129][115] US 101 Alternative was re-designated as SR 1 in 1963.[130] The next year, California streamlined its numbered routes across the state and stipulated that U.S. Highways be removed in favor of Interstate highways.[131][132] As a result, I-5 supplanted US 101 entirely between Los Angeles and the Mexican border,[115][133] after which, many of US 101's former surface roads were relinquished for municipal and county control.[134] The section through Camp Pendleton was closed off to the public,[115] while a majority of the route in northern San Diego County was designated County Route S21.[123] Historic route signs were also added to former sections in San Diego, Del Mar, and Solana Beach.[134]
Los Angeles and the Central Coast
The first section of downtown Los Angeles–San Fernando Valley expressway to open was the Cahuenga Pass Freeway in 1940.[105] This section was extended by 10 miles (16 km) at a cost of $55 million in 1954 ($659 million in 2025),[105] to Vineland Avenue in the San Fernando Valley and Spring Street in downtown's Civic Center, at which point the route was renamed Hollywood Freeway.[135] The Downtown Slot also opened in 1954,[136][111] while the Four Level Interchange, the world’s first stack interchange, was completed in 1949 but not put into full use until 1953.[137] Proposed interchanges with the never-built Beverly Hills Freeway near Glendale, Malibu Freeway near Malibu Canyon, and the Laurel Canyon Freeway at the Hollywood Split were canceled in response to freeway revolts in the 1960s and 1970s.[138]
In 1952, the State Highway Commission announced plans for a freeway along El Camino Real through Los Angeles' San Fernando Valley.[139] The route, which previously ran along Ventura Boulevard[140] between Sepulveda Boulevard and the western city limit, was constructed and opened in segments between 1956 and 1960,[139] and by 1961, US 101 had been upgraded to freeway standards from Los Angeles through Santa Barbara.[141][142] Conejo Grade was built as part of this upgrade; it replaced a windy two-lane road built in 1914.[143] Grade separation in Camarillo was also part of the upgrade; completed in 1954, it eliminated the last railroad crossing on US 101 between Los Angeles and San Francisco.[144]
West of Santa Barbara, US 101 traversed the Gaviota Pass, which was originally part of El Camino Real and was declared California Historic Landmark No. 248 in 1937.[145][146] Gaviota Tunnel opened to northbound traffic in the pass in 1953,[147] with the previous road repurposed for southbound traffic.[148] By 1954, the entire route was upgraded to expressway standards through the pass.[149]
North of Gaviota, bypasses funded by the Collier–Burns Highway Act of 1947[150][151] allowed US 101 to bypass most town centers by the 1950s,[152] although an interchange of US 101/SR 1 was constructed in Las Cruces in 1967, destroying the town.[153][154] Conversely, a 1951 study determined that frontage-road businesses along a new Santa Barbara–Buellton alignment saw minimal impact on the businesses' customer volume.[155] This combined with improvements into Santa Ynez Valley lengthened US 101 by 12 miles (19 km), but shortened travel time because it allowed for higher speeds.[156]
In the northern Central Coast, Prunedale Cutoff replaced a more hazardous route over the Gabilan Range via San Juan Grade in 1932[157] and Cuesta Pass opened as an expressway in 1938.[158][159] In Salinas, US 101 was built as a freeway for 10 miles (16 km) by 1954[160] and Sala Road interchange, adopted in 1964, connected to this segment.[161]
San Francisco Bay Area
Bayshore Highway, located on the San Francisco Peninsula, was completed in 1929,[162] the first section to open being a tolled arterial between San Bruno and Visitacion Valley.[163] Between 1929 and 1936,[164] US 101 was signed as US 101W along the peninsula and US 101E along the East Bay to Oakland, the latter then overlapping with US 40 westward across the San Francisco Bay through a ferry connection. The split routes then rejoined at Hyde Street Pier in San Francisco.[165] Additional ferries traversed the Golden Gate prior to completion of the Golden Gate Bridge in 1937.[166]
In 1936, US 101 on the San Francisco Peninsula was truncated at Bayshore Highway, while El Camino Real was re-signed as US 101 Alternate.[164] However, due to local opposition, this section of US 101 was reverted to El Camino Real two years later, while Bayshore Highway was renamed US 101 Bypass.[167] US 101E was also re-signed as SR 17 during this time.[168]
Bayshore Highway was upgraded to freeway standards starting in 1940.[169] The first segment, a two-mile (3.2 km) stretch between San Mateo and Burlingame, was completed in 1947,[170] making it the Bay Area's first freeway.[171] The freeway was extended to San Jose and San Francisco in 1962,[172] after which it was designated part of US 101 while El Camino Real was re-signed as SR 82.[173] Plans to build a direct connection to the Golden Gate Bridge on the Central Freeway, a northerly continuation of the Bayshore Freeway,[174] were canceled in 1959 due to backlash by residents;[175][176] as a result, only one section of this segment was completed.[177]
In Santa Clara County, a four-lane alignment replaced a windy section of US 101 across the Pajaro River in Sargent in the early 1940s[178] and a 24.6-mile (39.6 km) bypass through southern Santa Clara Valley was adopted in 1961 and constructed in the early 1970s.[179][180] Additionally, Joe Colla Interchange was completed in 1981, after lengthy delays.[181][182]
In Marin County, US 101's Sausalito–San Rafael segment was completed in the early 1930s; construction concluded with a one-quarter-mile (0.40 km) redwood bridge over Richardson Bay.[183][184] Twin bores of Waldo Tunnel (later renamed Robin Williams Tunnel), which connect Sausalito and Marin City at the highest point of Waldo Grade, opened individually in 1937 and 1954,[185][186] and the bridge across Richardson Bay was replaced in 1956.[187] Additionally, numerous North Bay improvements in the 1950s centered on bypassing cities and freeway upgrades.[188][189] An exception was Santa Rosa, where US 101 was routed through the city;[190] even so, the route was upgraded to freeway standards with the completion of Steele Lane interchange in 1965.[191] Additional bypasses were constructed in Novato and Geyserville in the 1970s.[192][193]
Northern California
While Redwood Highway was completed in 1926,[95] some remote sections in Mendocino, Humboldt, and Del Norte counties were redeveloped soon after to improve grades and provide curve corrections. For example, a segment built between Outlet Creek and Reeves Creek in the late 1930s eliminated 47 turns,[194] and a new 1940s alignment in Piercy lowered the segment's total curvature from 2,978 degrees to 807.[195] Additionally, six miles (9.7 km) of the highway in Del Norte county were relocated in the early 1930s, due to landslides along the original route.[93]
Despite these and other upgrades, freeway and expressway segments are not as prevalent on this segment of US 101 compared to elsewhere in the state.[196] A variety of factors, most of which came into play in the middle of the 20th century, contributed to this, most notably local business owners opposed bypasses,[197][198] and conservationists protested the destruction that the construction of a multi-lane highway would necessitate.[199] On the other hand, Eureka-based Times-Standard, as well as several local taxpayer groups, supported the improved safety that upgrades would bring. The Redwood Empire Association also urged the State Highway Commission to not truncate US 101 outside state park boundaries.[200]
Ridgewood Grade, located in Mendocino County and opened in 1954, was the first section of Redwood Highway upgraded to expressway.[201] The following year, Assemblyman Frank P. Belotti introduced legislation that would allot $10 million ($120 million in 2025) from state park funds towards a 23-mile (37 km) bypass through Humboldt Redwoods State Park. Governor Goodwin Knight later vetoed the bill, after which the two sides agreed to expand the bypass to 44 miles (71 km) around the park and only remove trees with heights less than six feet (1.8 m). This bypass was completed in the 1960s at an estimated $36 million ($426 million in 2025), while the old alignment, known as the Avenue of the Giants, became SR 254.[202][203]
In Eureka, Big Lagoon trestle was demolished in favor of embankments carrying a three-mile (4.8 km) expressway, which opened in 1959 at a cost of $1.84 million ($203 million in 2025).[204] Additionally, the Arcata–Trinidad freeway located north of Eureka was completed by the early 1960s,[205] as was a second freeway section from Hydesville to south of Eureka with bypasses at Fortuna and Loleta.[206][207] The southern segment was augmented by the Herrick Avenue interchange in 1984, and by the SR 36 interchange at Alton in 2011.[208][180]
Elsewhere along Redwood Highway, a 14.5-mile (23.3 km) freeway upgrade was completed in Ukiah in 1965,[209] then extended north through Redwood Valley in the late 1980s,[210] and a $1 million ($10.7 million in 2025), thirteen-span viaduct opened across Eel River in 1964.[211] Additionally, numerous bridges were damaged during the Christmas flood of 1964,[212][213] each of which was repaired or replaced by the following March, the last being a new construction that replaced Douglas Memorial Bridge over Klamath River.[214]
Modern developments
Los Angeles and the Central Coast
The last traffic signal on US 101 between Los Angeles and San Francisco, located in Santa Barbara, was removed in 1991.[215] A lane was added in both directions of the Ventura Freeway in the 1990s, eliminating several bottlenecks,[139] and the Van Nuys Boulevard on and off-ramps were widened to reduce congestion at the nearby US 101/I-405 interchange in 2011.[216] New lanes and truck pullouts were added to Cuesta Grade in 2004,[23] and three interchanges were added in Prunedale in 2014.[161] A four-phase widening project to add a lane in each direction in the Santa Barbara area began construction in 2008; its final phase, which includes the addition of high-occupancy lanes, began in 2020, at which point the phase was estimated to cost $700 million ($871 million in 2025) and be completed in 2027.[217][218]
In 2024, the city of Los Angeles undertook a beautification project on 8.7 miles (14.0 km) of US 101 in Hollywood, the project emphasizing the movie culture in the area and featuring amongst other artwork a 22-foot (6.7 m) steel art sculpture depicting fluttering filmstrips in the freeway median.[219] Construction of the Wallis Annenberg Wildlife Crossing also began in 2024; this crossing, a vegetated overpass spanning US 101 in Agoura Hills, will connect the Santa Monica Mountains with the Simi Hills and upon completion will be the largest wildlife crossing in the world.[220]
San Francisco Bay Area
In 1984, San Mateo and Santa Clara County residents voted to use sales tax funds to fund HOV lanes on US 101 in their counties.[221] These lanes were extended through San Jose in 1990 and into Morgan Hill by 2003,[222][223] and the Mountain View–Redwood City section was converted to HOT lanes in 2022,[47][48] then extended to San Bruno in 2023.[49][224] Furthermore, US 101 was expanded to eight lanes between SR 85 in San Jose and Cochrane Road in Morgan Hill in 2003, and a new interchange at Bailey Avenue, planned since the 1970s, opened in 2004.[225]
The 1989 Loma Prieta earthquake caused severe damage to San Francisco's Central Freeway, prompting its immediate closure.[226][227] In 1997, a narrow majority of residents voted to rebuild the freeway; however, another vote the following year saw the majority vote for it to be dismantled, and this vote was affirmed the year after that.[228] Demolition was completed by 2005, and the vacated right-of-way was redeveloped into Octavia Boulevard.[229][230]
In 2000, Caltrans and the Metropolitan Transportation Commission unveiled a joint plan to build continuous HOV lanes on US 101 throughout the North Bay.[231] At the time, facilities were already existent in Marin County, having been converted from contraflow bus lanes in the 1980s,[232] but a gap at San Rafael was not filled until 2011.[233] HOV lanes opened in Sonoma County in 2022,[234][235] and the final segment between Petaluma and the Marin–Sonoma county line opened in 2025;[236][237] these segments were also tied to a separate 30-year, $1.5 billion US 101 improvement project that was completed in 2025.[238] As part of this project, HOV lanes were built between Novato and Sonoma County, the entire route between Novato and Petaluma was upgraded to freeway standards, and new bridges were built across the San Antonio Creek and Petaluma River.[236][239]
In 2009, a project began to rebuild US 101's approach to Golden Gate Bridge through the Presidio, replacing the aging Doyle Drive viaduct.[240] The new approach, known as Presidio Parkway, incorporated two sets of tunnels and opened in 2015,[241] while the Presidio Tunnel Tops recreational area, located above the tunnels, opened in 2022.[242] Also in 2022, San Francisco Municipal Railway built center bus lanes and landscaped medians on Van Ness Avenue, including its US 101 segment, as part of the Van Ness Bus Rapid Transit project.[243]
Northern California
US 101 was truncated onto a new alignment through Prairie Creek Redwoods State Park from the late 1980s to early 1990s.[180] A four-mile (6.4 km) bypass in Cloverdale was completed in 1994 at a cost of $40 million ($86.9 million in 2025); the project also added frontage roads and relocated Northwestern Pacific Railroad trackage.[244] In 2009, a section of US 101 north of Leggett was moved across Eel River via the Confusion Hill Bridges in order to prevent the infrequent but expensive winter closures that occurred along the old alignment.[245] Additionally, a six-mile (9.7 km) bypass at Willits broke ground in 2013 and was completed in 2016, more than sixty years after initially proposed.[246] This project, controversial because it re-routed US 101 through protected wetlands,[247] cost $459 million ($616 million in 2025),[248] included a 1.1-mile (1.8 km) viaduct across a flood plain,[249] and re-located the US 101/SR 20 interchange from inside city limits to south of the city. As of 2025[update], the remainder of the old route was still part of the state highway system, under the designation 101U (for unrelinquished).[250]
Future
In Los Angeles, two plans to cap US 101 have been proposed: one downtown[251] and the other in Hollywood,[252] with the Hollywood Freeway cap estimated to cost $1 billion in 2015 (equivalent to $1.29 billion in 2024)[118][253] and the downtown cap $180 million in 2017 (equivalent to $226 million in 2024).[118][251] Elsewhere in Southern California, a long term traffic reduction project for a 27-mile (43 km) stretch between SR 23 and SR 33 was under study as of 2026[update].[41]
In San Luis Obispo County, an $85 million traffic easement project in Pismo Beach began in 2026,[254] with an expected completion date of December 2028,[255] and improvements between Cuesta Grade and the northern county line are also under study.[256] In Monterey County, preliminary work on multiple improvements to an eight-mile (13 km) stretch between Salinas and Chualar, the result of which would upgrade the corridor from expressway to freeway,[257] began in 2024, with construction scheduled to begin in 2031.[258] The US 101/SR 156 interchange has also been proposed for reconstruction and US 101 upgraded from expressway to freeway through it.[257]
Numerous upgrades to US 101 are either under study or in the works in the Bay Area. In San Mateo County, improvements to the US 101/SR 92 interchange are scheduled to begin in 2027[259] and the county also has plans to add 22 miles (35 km) of express lanes between I-380 and the north county line, after which express lanes would span the entire county.[260][261] A $135 million construction project to improve the US 101/SR 25 interchange began in 2025 with an expected completion in 2027,[262] while a US 101/SR 84 improvement project is scheduled to begin construction in 2027.[263] In more long term plans, several proposals have been made to address sea level rise on a particularly vulnerable stretch of US 101 in Marin City by 2050.[264]
In Northern California, Caltrans determined in 2000 that a bypass around Richardson Grove State Park was cost-prohibitive and instead recommended the section be realigned in compliance with the Surface Transportation Assistance Act of 1982,[6][7] but as of 2026[update], construction on the re-alignment had not begun.[265] Caltrans has also proposed a 6,000-foot (1,800 m) tunnel between Klamath and Crescent City that would replace Last Chance Grade; the tunnel was estimated to cost $2 billion in 2026.[266][267] Smaller projects in Northern California include fixing a portion of US 101 slipping into the South Fork Eel River near the Mendocino–Humboldt county line.[268]
Names and memorials
The entirety of US 101 in California is named Coast Highway and Blue Star Memorial Highway. Various segments also have additional names or memorial designations, although most are not used colloquially.[20] Instead, California residents usually refer to US 101 as "101" ("one-oh-one"), or in the case of southern Californians, "the 101".[269]
In Southern California, US 101 is named Santa Ana Freeway in downtown Los Angeles between the route’s southern end and SR 110,[20] Hollywood Freeway in Los Angeles between SR 110 and SR 170,[20] and Ventura Freeway between SR 134 in Los Angeles and the western Ventura County border.[20][270] US 101 is also named Screaming Eagles Highway in Ventura County and this section is also part of the National Purple Heart Trail.[20][271]
Along the Central Coast, various segments of US 101 are named El Camino Real or El Camino Real Freeway;[272] some segments also coincide with the Juan Bautista de Anza National Historic Trail[273][274] and the entire route, including all of US 101 in Santa Barbara, San Luis Obispo, and Monterey counties, is part of the National Purple Heart Trail.[20] Additionally, in Monterey County, US 101 is named John Steinbeck Highway between SR 68 and Espinoza Road/Russel Road in Salinas and Gateway to the Pinnacles Highway between Arroyo Seco Road and Camphora Gloria Road near Soledad.[20]
US 101 has numerous names in the Bay Area. In the South Bay, US 101 is named South Valley Freeway between Gilroy and SR 85 in San Jose,[275] Sig Sanchez Highway in Santa Clara County between the Morgan Hill Bypass and an undefined point,[20] and Bayshore Freeway between SR 82 in San Jose and I-80 in San Francisco.[20] In San Francisco, US 101 is named Central Freeway between I-80 and Mission Street,[276] near Potrero Hill the route is often called Hospital Curve due to its proximity to San Francisco General Hospital,[14][277] and the route’s surface street sections are commonly referred to by their street names.[14] US 101 is named Redwood Highway throughout the entirety of the North Bay; it is also named William T. Bagley Freeway between the Robin Williams Tunnel in Sausalito and I-580 in San Rafael[20][278] and Colonel William R. “Bill” Lucius Highway between the southern Sonoma County border and Russian River south of Healdsburg.[20]
In Northern California, US 101 is named Redwood Highway for almost its entire length; only the 16 miles (26 km) between US 199 and the Oregon border is not.[14] US 101 also has several other names in this area. In Humboldt County, it is named Leo Stanley Hulett Highway in Willits,[20] Frank P. Belotti Highway between the southern terminus of Avenue of the Giants and Englewood,[14][20] and Don Clausen Highway along the Redwood National Park bypass.[279] Additionally, in Eureka, US 101 is known by various names: Michael J. Burns Freeway on the expressway, Broadway on the north–south street segment (largely unsigned and not registered on Caltrans' logs), and by its street names along its downtown couplet.[280][20] US 101 is also known by its street names along its Crescent City couplet.[14]
Dozens of segments of US 101 in California are designated as memorial routes. Differing segments in Humboldt, Sonoma, Marin, and Monterey counties are named various forms of Veterans Memorial Highway, the segment between Ralston Avenue in Belmont and SR 92 is named Civilian Women Volunteer All Wars Memorial Freeway, a segment near Soledad State Prison is named Soledad State Prison Correctional Officers Memorial Highway, and a segment near Chualar is named Bracero Memorial Highway. Additionally, several memorial freeways and highways are named after individuals, most notably James Lick Memorial Freeway in San Francisco.[20]
Many of US 101's individual features are also named, including interchanges (East Los Angeles Interchange, Four Level Interchange, Hollywood Split, Joe Colla Interchange),[281][282] bridges and viaducts (Golden Gate Bridge, Confusion Hill Bridges, many others),[20] and more. Some intersections have also been unofficially nicknamed, including East Los Angeles Interchange (Malfunction Junction, the Beast),[283][284] Four Level Interchange (Four Letter Interchange),[284] US 101/I-80 (Alemany Maze),[285] and US 101/Cesar Chavez Street/Bayshore Boulevard/Potrero Avenue (The Hairball).[286] Furthermore, Bayshore Highway was unofficially nicknamed Bloody Bayshore before it was upgraded to freeway standards[287] and US 101 between Petaluma and Novato was known as Novato Narrows[288] before high-occupancy vehicle lanes were added in 2025.[289][290]
Finally, because SR 1 is known as Pacific Coast Highway (or PCH for short), the segments of US 101 that run concurrently with it are also known by this name.[291]
Major intersections
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. Postmile prefixes include: R reflecting a realignment in the route since then, M indicating a second realignment, L referring to an overlap due to a correction or change, and T indicating postmiles classified as temporary.[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
| County | Location | Postmile [1][292][293] | Exit [294] | Destinations | Notes |
|---|---|---|---|---|---|
| Los Angeles LA S0.00-38.19 | Los Angeles | | — |  I-5 south (Santa Ana Freeway south) – Santa Ana | No access to I-5 north; southern terminus of US 101; southern end of East Los Angeles Interchange |
| | — | Euclid Avenue | Southbound exit and northbound entrance | ||
| | — |  SR 60 east (Pomona Freeway) / Soto Street – Pomona | Southbound exit and northbound entrance; northern end of East Los Angeles Interchange proper; SR 60 west exit 1C | ||
| S0.00 | 1A | Seventh Street | Southbound exit and northbound entrance | ||
| | Whittier Boulevard | Northbound entrance only | |||
| S0.62 | 1A | Fourth Street | No northbound entrance; signed as exit 1B southbound | ||
| S0.91 | 1B | First Street | No southbound entrance; signed as exit 1C southbound | ||
| | 1C | Cesar Chavez Avenue | Northbound exit only; was formerly Brooklyn Avenue | ||
| S1.33 0.00 | 1D |  I-10 east (San Bernardino Freeway) – San Bernardino | No southbound entrance; San Bernardino Split portion of the East Los Angeles Interchange; access to I-10 east via the San Bernardino Freeway spur; no access to I-10 west; left exit southbound; I-10 west exit 19B; former western terminus of US 60 / US 70; former US 99 south;[295] former I-110 east (1958–1965) | ||
| 0.10 | 1E | Mission Road | No northbound exit | ||
| 0.62 | 2A | Vignes Street | Northbound exit and entrance | ||
| 0.62– 0.82 | 2A-B | Alameda Street – Union Station | Signed as exit 2A southbound, 2B northbound | ||
| 0.82 | 2B | Los Angeles Street | No northbound exit | ||
| 1.10 | 2C | Spring Street | Northbound exit only | ||
| 1.10 | 2C | Broadway | Southbound exit and northbound entrance | ||
| 1.40 | 3A | Temple Street | Southbound exit and entrance | ||
| 1.57 | 3B |    SR 110 (Arroyo Seco Parkway north, Harbor Freeway south) to I-110 south / Grand Avenue – Pasadena, San Pedro | Northern end of Santa Ana Freeway; southern end of Hollywood Freeway[296] access to I-110 south via SR 110 south; Four Level Interchange; Grand Avenue not signed southbound; signed as exit 3 northbound; SR 110 exit 24A | ||
| 2.48 | 4A | Glendale Boulevard, Echo Park Avenue, Union Avenue | Union Avenue not signed northbound; Echo Park Avenue not signed southbound | ||
| 2.86 | 4B |  SR 2 east (Alvarado Street) | Southern end of SR 2 overlap | ||
| 3.34 | 5A | Rampart Boulevard, Benton Way | |||
| 3.76 | 5B | Silver Lake Boulevard | |||
| 4.40 | 6A | Vermont Avenue | |||
| 4.85 | 6B | Melrose Avenue, Normandie Avenue | |||
| 5.55 | 7 |  SR 2 west (Santa Monica Boulevard) / Western Avenue | Northern end of SR 2 overlap | ||
| 6.25 | 8A | Sunset Boulevard | No northbound entrance | ||
| 6.52 | 8B | Hollywood Boulevard | |||
| 6.91 | 8C | Gower Street | |||
| 7.06 | 9A | Vine Street | Southbound exit only | ||
| 7.46 | 9B | Cahuenga Boulevard – Hollywood Bowl | Signed as exit 9A northbound | ||
| 7.84 | 9C | Highland Avenue – Hollywood Bowl | Former SR 170 south; signed as exit 9B northbound | ||
| 8.84 | Cahuenga Pass, elevation 745 feet (227 m)[297] | ||||
| 9.22 | 11A | Barham Boulevard – Burbank | No southbound exit, which was permanently closed on October 17, 2015, due to weaving concerns with the construction of the new Universal Studios Boulevard southbound onramp.[298] | ||
| 9.60 | 11B | Universal Studios Boulevard | No southbound exit; serves Universal Studios Hollywood | ||
| 10.34 | 12A | Lankershim Boulevard – Universal City | Serves Universal Studios Hollywood | ||
| 10.56 | 12B | Ventura Boulevard | No southbound exit | ||
| 11.11 | 12C |   Vineland Avenue to SR 134 east – Pasadena | Signed as exit 12B southbound; "to SR 134" not signed southbound | ||
| | Moorpark Street | Northbound entrance only | |||
| 11.80 | 13 |   SR 170 north (Hollywood Freeway north) – Sacramento | Northbound left exit and southbound left entrance; southbound access is via exit 13A; US 101 north transitions onto Ventura Freeway west;[296] southern end of Hollywood Split; SR 170 south exit 5A | ||
| 11.83 | 13A | Tujunga Avenue to SR 170 north | Southbound exit and northbound entrance | ||
| 11.65 | 13B | SR 134 east (Ventura Freeway east) – Pasadena | Southbound exit and northbound entrance; northbound access is via exit 12C; US 101 south transitions onto Hollywood Freeway south;[296] northern end of Hollywood Split; SR 134 west exit 1A | ||
| 12.85 | 14 | Laurel Canyon Boulevard – Studio City | |||
| 13.88 | 15 | Coldwater Canyon Avenue | |||
| 14.89 | 16 | Woodman Avenue | |||
| 15.91 | 17 | Van Nuys Boulevard | |||
| 16.94 | 18 | Sepulveda Boulevard | Northbound exit and southbound entrance | ||
| 17.17 | 19A |  I-405 (San Diego Freeway) – Santa Monica, Sacramento | I-405 exit 63B | ||
| 17.50 | 19B | Haskell Avenue | No southbound entrance | ||
| 18.61 | 20 | Hayvenhurst Avenue | Northbound exit and southbound entrance | ||
| 19.22 | 21 | Balboa Boulevard – Encino | |||
| 20.23 | 22 | White Oak Avenue | |||
| 21.25 | 23 | Reseda Boulevard | |||
| 22.25 | 24 | Tampa Avenue | |||
| 23.26 | 25 | Winnetka Avenue – Woodland Hills | |||
| 24.31 | 26A | De Soto Avenue, Serrania Avenue | Signed as exit 26 southbound | ||
| 24.85 | 26B | Canoga Avenue | Northbound exit and southbound entrance | ||
| 25.34 | 27 |  SR 27 (Topanga Canyon Boulevard) / Ventura Boulevard | Signed as exits 27A (north) and 27B (south) northbound | ||
| 25.76 | 27C | Shoup Avenue | Northbound exit and southbound entrance | ||
| 26.45 | 28 | Fallbrook Avenue | Southbound exit only | ||
| 26.86 | 28 | Woodlake Avenue | Northbound exit and entrance | ||
| 27.36 | 29 | Mulholland Drive, Valley Circle Boulevard | |||
| Calabasas | 28.29 | 30 | Parkway Calabasas | ||
| 31.06 | 32 | Las Virgenes Road (CR N1) – Malibu Canyon | |||
| 31.92 | 33 | Lost Hills Road | |||
| Agoura Hills | 32.79 | 34 | Liberty Canyon Road | ||
| | Wallis Annenberg Wildlife Crossing (planned to opened in early 2026)[299] | ||||
| 33.69 | 35 | Chesebro Road | |||
| 35.04 | 36 | Kanan Road (CR N9) | |||
| 36.18 | 38 | Reyes Adobe Road | |||
| Westlake Village | 37.54 | 39 | Lindero Canyon Road | ||
| Ventura VEN 0.00-R43.62 | Thousand Oaks | 0.70 | 40 |   SR 23 south (Westlake Boulevard) | Southern end of SR 23 overlap |
| 1.62 | 41 | Hampshire Road | |||
| 3.02 | 43A | Rancho Road | Signed as exit 43B northbound | ||
| 3.11 | 43B | SR 23 north (Moorpark Freeway) – Fillmore, Simi Valley | Northern end of SR 23 overlap; signed as exit 43A northbound; SR 23 south exits 12A-B; Simi Valley not signed southbound | ||
| 4.06 | 44 | Moorpark Road | |||
| 5.05 | 45 | Lynn Road | |||
| 6.19 | 46 | Ventu Park Road – Newbury Park | |||
| 7.02 | 47A | Rancho Conejo Boulevard, Borchard Road | Signed as exits 47A (Rancho Conejo Boulevard) and 47B (Borchard Road) northbound | ||
| 7.89 | 47B | Wendy Drive – Newbury Park | Signed as exit 47C northbound | ||
| 9.10 | Conejo Weigh Station[300] | ||||
| Camarillo | 10.74 | 50 | Camarillo Springs Road – Camarillo Grove County Park | Signed as exit 51 northbound | |
| 12.30 | 52 | Santa Rosa Road, Pleasant Valley Road | |||
| 13.75 | 53A | Flynn Road | Northbound signage | ||
| Dawson Drive | Southbound signage | ||||
| 13.85 | 53B |  SR 34 (Lewis Road) | |||
| 14.80 | 54 | Carmen Drive | |||
| 15.89 | 55 | Las Posas Road | |||
| 16.79 | 56 | Springville Drive | |||
| 17.75 | 57 | Central Avenue | |||
| Oxnard | 19.17 | 59 | Del Norte Boulevard | ||
| 20.08 | 60 |  SR 1 south (Rice Avenue) / Santa Clara Avenue | Southern end of SR 1 overlap[a] | ||
| 21.01 | 61 | Rose Avenue | |||
| 22.01 | 62A |  SR 232 (Vineyard Avenue) – Oxnard | |||
| 22.73 | 62B | Oxnard Boulevard | Former SR 1 south | ||
| R23.12 | 63A | Ventura Road | Southbound exit only | ||
| Ventura | R23.45 | 63B | Johnson Drive | Signed as exit 63 northbound | |
| R24.65 | 64 | Victoria Avenue – Channel Islands Harbor | |||
| 25.97 | 65 | Telephone Road | Northbound entrance is via Main Street | ||
| 26.39 | 66A |  SR 126 east (Santa Paula Freeway) – Santa Clarita | Signed as exit 66 southbound; southbound entrance is via exit 1C from SR 126 west; SR 126 west exit 1A | ||
| 26.72 | 66B | Main Street (US 101 Bus. north) | No southbound exit | ||
| 28.45 | 68 | Seaward Avenue | |||
| 29.45 | 69 | Vista del Mar Drive, Sanjon Road | Northbound exit and southbound entrance | ||
| 30.15 | 70A | California Street, Ventura Avenue | |||
| 30.91 | 70B |  SR 33 north (Ojai Freeway) – Ojai | |||
| 31.50 | 71 | Main Street (US 101 Bus. south) | Southbound exit and northbound entrance | ||
| | R32.70 | 72 | SR 1 north (PCH) – State Beaches | Northern end of SR 1 overlap;[a] northbound exit and southbound entrance | |
| | R38.98 | 78 | SR 1 south (PCH) – Seacliff | Southern end of SR 1 overlap[a] | |
| | R39.80 | 79 | Mussel Shoals (Old Pacific Coast Highway) | Southbound exit and entrance | |
| | 41.00 | 81 | La Conchita (West Surfside Street) | Northbound exit and entrance | |
| | R43.57 | 83 | Bates Road | ||
| Ventura–Santa Barbara county line | | R43.62 R0.00 | Northwestern end of Ventura Freeway[296] | ||
| Santa Barbara SB R0.00-90.99 | Carpinteria | R0.63 | 84 |  SR 150 east – Ojai, Lake Casitas | |
| 1.61 | 85 | Bailard Avenue | |||
| 2.64 | 86A | Casitas Pass Road | Signed as exit 86 northbound; former SR 224 | ||
| 3.06 | 86B | Linden Avenue | Southbound exit and northbound entrance | ||
| 3.77 | 87A | Reynolds Avenue, Santa Monica Road | Signed as exit 87 northbound | ||
| 4.34 | 87B | Carpinteria Avenue | Southbound exit only | ||
| Toro Canyon | R5.28 | 88 | Santa Claus Lane, South Padaro Lane | South Padaro Lane not signed southbound | |
| Summerland | R7.14 | 90 | Padaro Lane – Summerland | Signed as North Padaro Lane northbound | |
| R8.26 | 91 | Evans Avenue – Summerland | |||
| Montecito | 9.00 | 92 | Sheffield Drive | ||
| 10.02 | 93 | San Ysidro Road | |||
| 10.54 | 94A | Olive Mill Road, Coast Village Road | No northbound entrance | ||
| Santa Barbara | 11.10 | 94B | Hermosillo Road | Northbound exit only | |
| 11.41 | 94C | Cabrillo Boulevard, Coast Village Road | No southbound entrance; signed as exit 94B southbound; interchange is undergoing reconstruction between 2026 and 2028[301] | ||
| | 95 | Los Patos Way (unsigned) | Former southbound exit only; demolished in 2026 during the reconstruction of the Cabrillo Boulevard interchange[301] | ||
| 12.10 | 95 | Salinas Street | Northbound exit and entrance | ||
| 12.75 | 96 | Milpas Street | Former SR 144; northbound exit signed as exit 96A; southbound as exits 96B and 96A | ||
| 13.49 | 96 | Laguna Street, Garden Street – Downtown Santa Barbara | Laguna Street/Garden Street northbound exit signed as exit 96B; Garden Street southbound exit signed as exit 96C | ||
| R14.19 | 97 | Bath Street, Castillo Street; Santa Barbara Harbor | |||
| R14.76 | 98A | Carrillo Street – Downtown Santa Barbara | Signed as exit 98 southbound | ||
| 15.26 | 98B | Arrellaga Street | Northbound exit and entrance | ||
| R15.73 | 99A | Mission Street | Signed as exit 99 southbound | ||
| 16.05 | 99B | Pueblo Street | Northbound exit only | ||
| 16.55 | 100 | Las Positas Road | Former SR 225 | ||
| 17.78 | 101A | La Cumbre Road, Hope Avenue | |||
| 18.38 | 101B |  SR 154 west / State Street – Cachuma Lake | |||
| Eastern Goleta Valley | 18.92 | 102 | El Sueno Road | Northbound exit and entrance | |
| 20.06 | 103 | Turnpike Road | |||
| Goleta | 21.15 | 104A | Patterson Avenue | Signed as exit 104 southbound | |
| 21.41 | 104B |   SR 217 west – Airport, UCSB | Northbound exit and southbound entrance | ||
| 22.53 | 105 | Fairview Avenue | |||
| 23.72 | 107 | Los Carneros Road | |||
| 24.77 | 108 | Glen Annie Road, Storke Road | |||
| 26.91 | 110 | Winchester Canyon Road, Hollister Avenue | All ramps are via Cathedral Oaks Road | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| | 30.06 | 113 | Dos Pueblos Canyon Road | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| | 32.84 | 116 | El Capitan Ranch Road | ||
| | 33.85 | 117 | El Capitan State Beach | ||
| | 36.62 | 120 | Refugio Road – Refugio State Beach | ||
| | | Northern end of freeway | |||
| Gaviota | 44.82 | 128 | Mariposa Reina | Interchange | |
| | Gaviota State Beach (Gaviota Beach Road) | At-grade intersection | |||
| Gaviota Pass | 46.30– 46.90 | Gaviota Rest Area[302] | |||
| 47.19 | Gaviota Gorge Tunnel (northbound only) | ||||
| | | Southern end of freeway | |||
| Las Cruces | R48.85 | 132 | SR 1 north – Lompoc, Vandenberg SFB | Northern end of SR 1 overlap[a] | |
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Buellton | R56.46 | 139 | Santa Rosa Road | ||
| R57.12 | 140A |  SR 246 – Lompoc, Solvang | |||
| R57.55 | 140B | McMurray Road, Avenue of the Flags | |||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| | 62.67 | 146 | SR 154 east / Zaca Station Road – Los Olivos, Cachuma Lake | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Los Alamos | 70.92 | 154 |  SR 135 north – Los Alamos, Vandenberg SFB | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| | 78.69 | 161 | Solomon Summit Undercrossing | ||
| Orcutt | 82.18 | 164 | Clark Avenue – Orcutt | ||
| 83.42 | 166 | Union Valley Parkway | |||
| Santa Maria | 84.36 | 167 | Santa Maria Way (US 101 Bus. north) | ||
| 86.59 | 169 | Betteravia Road – Sisquoc | |||
| 87.60 | 170 | Stowell Road | |||
| 88.60 | 171 |  SR 166 west (Main Street) – Santa Maria, Guadalupe | Southern end of SR 166 overlap | ||
| 89.69 | 172 | Donovan Road | |||
| 90.75 | 173 | SR 135 south (Broadway, US 101 Bus. south) – Santa Maria | |||
| San Luis Obispo SLO 0.00-R69.32 | | 0.81 | 175 | SR 166 east – Maricopa, Bakersfield | Northern end of SR 166 overlap |
| Nipomo | 4.85 | 179 | Tefft Street – Nipomo | ||
| 6.43 | 180 | Willow Road | |||
| 7.84 | 182 | Thompson Road, Los Berros Road | |||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Arroyo Grande | 12.52 | 186 | Traffic Way (US 101 Bus. north), Fair Oaks Avenue | No northbound entrance | |
| 13.17 | 187A |  SR 227 north (Grand Avenue, US 101 Bus. south) | |||
| 13.75 | 187B | Brisco Road, Halcyon Drive | |||
| Pismo Beach | 14.61 | 188 | Oak Park Road | ||
| 15.58– 15.88 | 189 | 4th Street, Five Cities Drive | Signed as exits 189 (4th Street) and 190A (Five Cities Drive) southbound | ||
| 16.62 | 190 | Price Street (US 101 Bus. north) | No northbound entrance; northbound signage | ||
| 190B | Hinds Avenue, Price Canyon Road | No northbound entrance; southbound signage | |||
| 16.89 | 191A | Wadsworth Avenue | Northbound signage; northbound entrance via Bello Street, southbound entrance via Price Street | ||
| SR 1 south – Pismo Beach | Southbound signage; north and south entrances via Price Street | ||||
| 17.76 | 191B | Shell Beach Road | Northbound signage | ||
| Price Street (SR 1 south, US 101 Bus. south) | Southern end of SR 1 overlap; southbound signage | ||||
| R19.81 | 193 | Spyglass Drive | Northbound signage | ||
| Shell Beach Road | Southbound signage | ||||
| Avila Beach | R21.11 | 195 | Avila Beach Drive | ||
| R22.29 | 196 | San Luis Bay Drive – See Canyon, Avila Beach | |||
| | R24.30 | 198 | Higuera Street | ||
| San Luis Obispo | 25.91 | 200A | Los Osos Valley Road | Signed as exit 200 southbound | |
| 26.83 | 200B | Prado Road, Elks Lane | Northbound exit and entrance | ||
| 27.50 | 201 | SR 227 south (Madonna Road) | |||
| 28.07 | 202A | Marsh Street | |||
| 28.81 | 202B | Broad Street | |||
| 29.08 | 203A | Osos Street, Santa Rosa Street | |||
| 29.08 | 203B | SR 1 north – Morro Bay, Hearst Castle | Northern end of SR 1 overlap | ||
| 29.40 | 203C | California Boulevard | |||
| 29.77 | 203D | Grand Avenue – Cal Poly | Northbound exit and southbound entrance | ||
| 29.99 | 204 | Monterey Street | No southbound entrance | ||
| | | Northern end of freeway | |||
| | 35.00[303] | Cuesta Pass, elevation 1,522 feet (464 m)[303] | |||
| | | Southern end of freeway | |||
| | 37.85 | 211 |  SR 58 east – Santa Margarita | ||
| Atascadero | 42.27 | 216A | Santa Barbara Road | Signed as exit 216 southbound | |
| 42.90 | 216B | San Diego Way | Northbound exit and southbound entrance | ||
| 44.01 | 218A | Santa Rosa Road | |||
| 44.84 | 218B | Curbaril Avenue | |||
| 45.57 | 219 |  SR 41 (Morro Road) | |||
| 45.96 | 220A | Traffic Way (US 101 Bus. north) | |||
| 46.87 | 220B | San Anselmo Road | |||
| 48.33 | 222 | Del Rio Road (US 101 Bus. south) | |||
| 49.32 | 223 | San Ramon Road, Santa Cruz Road | |||
| Templeton | 50.64 | 224 | Vineyard Drive (US 101 Bus. north) | ||
| 51.45 | 225 | Las Tablas Road | |||
| 52.44 | 226 | Main Street (US 101 Bus. south) | |||
| Paso Robles | 53.89 | 228 |  SR 46 west – Cambria, Hearst Castle | Southern end of SR 46 overlap | |
| 55.67 | 229 | Spring Street (US 101 Bus. north) | Northbound exit and southbound entrance; former US 101 | ||
| 56.14 | 230 | Pine Street | Southbound exit and entrance | ||
| | 230 | Paso Robles Street | Northbound exit and entrance | ||
| 56.88 | 231A | 17th Street | Southbound exit and entrance | ||
| 57.92 | 231B | SR 46 east (24th Street / CR G14 west) – Fresno, Bakersfield | Northern end of SR 46 overlap; signed as exit 231 northbound | ||
| 58.76 | 232 | Spring Street (US 101 Bus. south) | No southbound entrance; former US 101 | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| San Miguel | 65.08 | 239A | Mission Street – San Miguel | Northbound exit and southbound left entrance | |
| 65.56 | 239B | 10th Street | Signed as exit 239 southbound | ||
| 67.23 | 241A | Mission Street – San Miguel | Southbound exit and northbound entrance | ||
| | R67.71 | 241B | South Camp Roberts (Frontage Road) | Signed as exit 241 northbound; served the former south entrance to Camp Roberts | |
| Monterey MON R0.00-101.32 | | R0.84 | 244 | Camp Roberts (main gate) | |
| | R2.15 | 245 | East Garrison (Bradley Road) | ||
| | R3.10– R5.10 | Camp Roberts Rest Area[302] | |||
| Bradley | R7.94 | 251 | Bradley (Bradley Road) | ||
| | R9.67 | 252 |  CR G18 (Jolon Road) – Fort Hunter Liggett | ||
| | R15.47 | 258 | Alvarado Road | ||
| | R17.86 | 260 | Los Lobos Road | ||
| | R21.99 | 263 | Paris Valley Road – San Ardo | ||
| | R29.90 | 271 | Paris Valley Road – Lockwood | ||
| San Lucas | R32.02 | 273 |  SR 198 east – San Lucas, Coalinga | ||
| | R37.31 | 278 | Wild Horse Road | ||
| King City | R39.77 | 281 | First Street (US 101 Bus. north / CR G15 to CR G13) | ||
| R40.72 | 282A | Canal Street | |||
| R41.18 | 282B | Broadway (US 101 Bus. south / CR G13) | |||
| | R41.95 | 283 |  CR G14 (Jolon Road) – Fort Hunter Liggett | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Greenfield | 52.66 | 293 | Espinosa Road (US 101 Bus. north, CR G16) | Former US 101 | |
| 53.36 | 294A | Oak Avenue | |||
| 53.86 | 294B | Walnut Avenue | |||
| 54.79 | 295 | Thorne Road (US 101 Bus. south) | Former US 101 | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Soledad | 60.40 | 301 | Arroyo Seco Road | ||
| 61.59 | 302 |  SR 146 (US 101 Bus. north) – Soledad | Former US 101 | ||
| 62.70 | 303 | Front Street (US 101 Bus. south) | |||
| | 64.63 | 305 | Camphora Gloria Road | ||
| | 66.40 | 307 | Salinas Valley State Prison | ||
| Gonzales | 69.37 | 310 | Gloria Road (US 101 Bus. north), Alta Street | Former US 101 | |
| 70.86 | 311 | 5th Street | |||
| 72.61 | 313 | Old Stage Road (US 101 Bus. south) | |||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Chualar | 76.97 | 317 | Chualar (Main Street) | ||
| | | Northern end of freeway | |||
| | 82.47 | 323 | Abbott Street (US 101 Bus. north) – Spreckels | Northbound left exit and southbound left entrance; interchange | |
| | | Southern end of freeway | |||
| Salinas | 85.62 | 326A | Airport Boulevard | ||
| | 326B | Fairview Avenue | Northbound exit only | ||
| 86.12 | 326C | Monterey Peninsula (South Sanborn Road) | Signed as exit 326B southbound | ||
| 86.82 | 327 |  SR 68 (John Street) | |||
| 87.30 | 328 |  Market Street to SR 183 – Santa Cruz | |||
| R88.24 | 329 | Main Street (SR 183, US 101 Bus. south) | |||
| R89.27 | 330 | Laurel Drive | |||
| R91.01 | 331 | Boronda Road (US 101 Bus. south) | |||
| | 92.19 | 333 | Sala Road | ||
| | | Northern end of freeway | |||
| Prunedale | 95.44 | 336 |  SR 156 west / Vierra Canyon Road – Monterey Peninsula | Southern end of SR 156 overlap; interchange | |
| 96.14 | 337 | San Miguel Canyon Road (CR G12) | Interchange | ||
| 98.37 | 339 | Crazy Horse Canyon Road, Echo Valley Road | Interchange | ||
| 100.39 | Dunbarton Road to San Juan Road (CR G11) | Closed in 2015 after the construction of the San Juan Road interchange[161] | |||
| San Benito SBT 0.00-R7.52 | | 0.13 | 342 | San Juan Road (CR G11) – Aromas, Watsonville | Interchange |
| | | Southern end of freeway | |||
| | 3.01 | 345 | SR 156 east – San Juan Bautista, Hollister | Northern end of SR 156 overlap | |
| | R4.90 | 347 |  SR 129 west – Watsonville, Santa Cruz | ||
| | R6.49 | 349 | Betabel Road, Y Road | ||
| | | Northern end of freeway | |||
| Santa Clara SCL R0.03-52.55 | | 3.16 | 353 |  SR 25 south – Hollister, Pinnacles National Park | Interchange |
| | | Southern end of freeway | |||
| Gilroy | R4.94 | 355 | Monterey Road (US 101 Bus. north) | ||
| R6.08 | 356 |  SR 152 east (Pacheco Pass Road) / 10th Street | Southern end of SR 152 overlap | ||
| R7.53 | 357 | SR 152 west (Leavesley Road / CR G9) – Gilroy | Northern end of SR 152 overlap | ||
| R8.90 | Southbound Gilroy Weigh Station[300] | ||||
| San Martin | R10.27 | 360 | Masten Avenue | ||
| R11.40 | Northbound Gilroy Weigh Station[300] | ||||
| R12.46 | 362 | San Martin Avenue | |||
| Morgan Hill | R15.07 | 365 | Tennant Avenue | ||
| R16.01 | 366 | East Dunne Avenue | |||
| R17.82 | 367 | Cochrane Road (US 101 Bus. south) | |||
| San Jose | R21.25 | 371 | Coyote Creek Golf Drive | ||
| R23.10 | 373 | Bailey Avenue | |||
| R26.78 | 377A |  SR 85 north (West Valley Freeway) – Mountain View, Cupertino | No northbound entrance; signed as exit 377B southbound; SR 85 south exit 1A | ||
| | ♦ | SR 85 north | HOV access only; northbound exit and southbound entrance | ||
| R27.00 | 377B | Silicon Valley Boulevard, Bernal Road | Signed as exit 377A southbound | ||
| R28.61 | 378 | Blossom Hill Road (CR G10) / Silver Creek Valley Road | Southern end of Bayshore Freeway;[296] former SR 82 | ||
| 30.10 | 380 | Hellyer Avenue | |||
| 31.00 | 381 | Yerba Buena Road | Southbound exit was separated from Exit 382 in 2014 | ||
| 31.70 | 382 | Capitol Expressway (CR G21) | |||
| 33.03 | 383 | Tully Road | |||
| 34.11 | 384 |    I-280 north / I-680 north – Downtown San Jose, Sacramento | Northbound exit and southbound entrance; southern end of Joe Colla Interchange; ramps extend over the Story Road interchange; I-680 exit 1B | ||
| 34.55 | 385A | Story Road | Signed as exit 385 northbound | ||
| 34.87 | 385B | I-280 north / I-680 north – San Francisco, Downtown San Jose, Sacramento | Southbound exit and northbound entrance; northern end of Joe Colla Interchange; I-680 exit 1B | ||
| R35.76 | 386A | Alum Rock Avenue, Santa Clara Street | Alum Rock Avenue is former SR 130 | ||
| R36.14 | 386B | McKee Road, Julian Street | |||
| | Mabury Road, Berryessa Road | Planned interchange[304] | |||
| 37.73 | 388A | Oakland Road, 13th Street | Former SR 238 | ||
| 38.30 | 388B |  I-880 north (Nimitz Freeway) – Oakland | I-880 exits 4B-C; former SR 17 | ||
| 38.30 | 388C | I-880 south (Nimitz Freeway) – Santa Cruz | |||
| 38.80 | 389A | Old Bayshore Highway, 4th Street | No southbound exit | ||
| 39.29 | 389B | Brokaw Road, First Street | Signed as exit 389 southbound | ||
| 39.93 | 390 |  SR 87 south (Guadalupe Parkway) | Southbound exit and northbound entrance; SR 87 north exit 9B | ||
| San Jose–Santa Clara line | 40.70 | 391 | Trimble Road, De la Cruz Boulevard (CR G6) | ||
| Santa Clara | 41.98 | 392 | San Tomas Expressway, Montague Expressway (CR G4) | ||
| 42.73 | 393 | Great America Parkway, Bowers Avenue | |||
| Sunnyvale | 43.85 | 394 | Lawrence Expressway (CR G2) | ||
| 44.83 | 395 | Fair Oaks Avenue | Signed as exits 395A (north) and 395B (south) southbound | ||
| 45.68 | 396A |  Mathilda Avenue to SR 237 east | Former SR 85 | ||
| | — | US 101 Express Lanes | Southern end of Express Lanes | ||
| 46.13 | 396B | SR 237 east – Milpitas | Southbound exit and northbound entrance; SR 237 west exit 3A | ||
| 46.13 | 396C | SR 237 west – Mountain View | Northbound exit and southbound entrance; SR 237 east exit 3A | ||
| Mountain View | 47.01 | 397 | Ellis Street | ||
| 47.89 | 398A | Moffett Boulevard, NASA Parkway | Signed as exit 398 northbound | ||
| | — |  SR 85 Express Lanes south | Express Lanes access only; southbound exit and northbound entrance | ||
| 48.10 | 398B | SR 85 south – Cupertino, Santa Cruz | Southbound exit and northbound entrance; northbound exit is via exit 396C; SR 85 north exit 24B | ||
| 48.60 | 399A | Shoreline Boulevard | Signed as exit 399 southbound | ||
| 48.97 | 399B | Old Middlefield Way | Northbound exit and southbound entrance | ||
| 49.61 | 400A | Amphitheatre Parkway, Rengstorff Avenue | Signed as exits 400A (Amphitheatre Parkway) and 400B (Rengstorff Avenue) northbound | ||
| Mountain View–Palo Alto line | 50.32 | 400C | San Antonio Road | Signed as exits 400B (north) and 400C (south) southbound | |
| Palo Alto | 52.01 | 402 | Oregon Expressway (CR G3) | ||
| 52.17 | 402 | Embarcadero Road | |||
| San Mateo SM 0.00-26.11 | East Palo Alto | 0.89 | 403 | University Avenue (to SR 109) | |
| East Palo Alto–Menlo Park line | 1.87 | 404 | Willow Road (SR 114) | ||
| Menlo Park | 3.59 | 406 |  SR 84 east (Marsh Road) – Dumbarton Bridge | Southern end of SR 84 overlap | |
| Redwood City | 5.39 | 408 | SR 84 west (Woodside Road) / Seaport Boulevard | Northern end of SR 84 overlap | |
| 6.62 | 409 | Whipple Avenue | |||
| San Carlos | | 411 | Brittan Avenue | Southbound exit and entrance | |
| 8.40 | 411 | Holly Street, Redwood Shores Parkway | |||
| | 412 | Harbor Boulevard | Southbound exit and entrance | ||
| Belmont | 9.55 | 412 | Marine Parkway, Ralston Avenue | Former Legislative Route 214[305] | |
| San Mateo | 11.15 | 414A | Hillsdale Boulevard – Foster City | ||
| 11.90 | 414B |  SR 92 – Hayward, San Mateo Bridge, Half Moon Bay | SR 92 exits 13A-B | ||
| 11.90 | 414B | Fashion Island Boulevard | No northbound exit | ||
| 12.69 | 415 | Kehoe Avenue | Northbound exit and entrance | ||
| 13.46 | 416 | 3rd Avenue | Former SR 92 | ||
| 14.33 | 417A | Dore Avenue | Northbound exit only | ||
| 14.33 | 417 | Poplar Avenue | Southbound exit and entrance | ||
| 14.69 | 417B | Peninsula Avenue – Burlingame | Northbound exit and entrance | ||
| Burlingame | 16.02 | 419A | Anza Boulevard | Northbound exit and entrance | |
| 16.58 | 419B | Broadway | Signed as exit 419 southbound | ||
| Millbrae | 17.95 | 421 | Millbrae Avenue | Signed as exit 420 southbound | |
| San Bruno | 19.12 | 422 | San Francisco International Airport | Southbound exit is part of exit 423A | |
| R20.39 | 423A | San Bruno Avenue | |||
| R20.72 | — | US 101 Express Lanes | Northern end of Express Lanes | ||
| 423B |   I-380 west to I-280 – San Bruno | I-380 west exit 6, east exits 6A-B | |||
| South San Francisco | R20.72 | 423C | North Access Road (I-380 east) – North Cargo Area | Southbound exit is part of exit 423A | |
| 21.69 | 424 | South Airport Boulevard | |||
| 21.92 | 425A | Grand Avenue – Downtown South San Francisco | No southbound entrance | ||
| 22.71 | 425B | Oyster Point Boulevard | |||
| | 425C | South San Francisco (Airport Boulevard) | Southbound exit and entrance | ||
| Brisbane | 23.39 | 426A | Brisbane, Cow Palace (Bayshore Boulevard) | Northbound exit only | |
| 23.66 | 426B | Sierra Point Parkway, Marina Boulevard | Signed as exit 426 southbound; southbound exit and entrance are located 1.2 miles (1.9 km) north of northbound exit and entrance | ||
| City and County of San Francisco SF 0.00-11.18 | 0.03 | 429A | Tunnel Avenue – Candlestick Park | ||
| 0.77 | 429B | Third Street – Cow Palace | |||
| 1.11 | 429C | Paul Avenue | No northbound entrance; signed as exit 430A southbound | ||
| 1.44 | 430A | I-280 – Daly City, Downtown San Francisco | Northbound exit and southbound entrance; southern end of Alemany Maze; ramps extend over the Silver Avenue interchange; I-280 north exit 54A, south exit 54 | ||
| 1.77 | 430B | Silver Avenue | No northbound entrance | ||
| 1.98 | 431 | I-280 south – Daly City | Southbound exit and northbound entrance; northern end of Alemany Maze; I-280 north exit 54B | ||
| 2.00 | 431 | Alemany Boulevard, Bayshore Boulevard | |||
| 2.92 | 432 | Cesar Chavez Street, Potrero Avenue | Cesar Chavez Street was formerly Army Street | ||
| 4.10 | 433A | Vermont Street | Northbound exit only | ||
| R4.24 | 433B |  I-80 east – Bay Bridge, Oakland | Northern end of Bayshore Freeway; southern end of Central Freeway;[296] signed as exit 433 southbound; I-80 exits 1A-B | ||
| R4.55 | 433C | Ninth Street – Civic Center | Northbound exit and southbound entrance | ||
| T5.20 | 434A | Duboce Avenue | Northbound exit and southbound entrance | ||
| 5.40 | 434B | Octavia Boulevard to Fell Street | Northbound exit and southbound entrance | ||
| | Northern end of Central Freeway | ||||
| | Market Street | No left turns | |||
| | Geary Boulevard | No left turn from northbound US 101 | |||
| | Broadway | No left turns from Broadway; no left turn from northbound US 101 | |||
| | Van Ness Avenue, Lombard Street | No left turn from southbound Van Ness Avenue; no left turn from westbound Lombard Street | |||
| | Southern end of Presidio Parkway | ||||
| | Southern end of freeway | ||||
| L8.59 | 437 | Marina Boulevard, Girard Road – Marina, Presidio | |||
| 9.40 | 438 | SR 1 south (Park Presidio Boulevard) – Golden Gate Park | Southern end of SR 1 overlap | ||
| 9.71 | 439 | Lincoln Boulevard – View Area, Presidio, Golden Gate NRA, Fort Point | Northern end of Presidio Parkway; Lincoln Boulevard not signed northbound | ||
| Golden Gate | 11.18– L0.01 | Golden Gate Bridge (Southbound toll only; no state maintenance on bridge) | |||
| Marin MRN L0.00-27.63 | Sausalito | 0.10 | H. Dana Bower Rest Area and Vista Point (northbound only);[302] southern end of Redwood Highway | ||
| 0.32 | 442 | Alexander Avenue | Last free exit for southbound traffic | ||
| 0.89 | Robin Williams Tunnel under Waldo Grade | ||||
| 1.52 | 443 | Spencer Avenue, Monte Mar Drive | |||
| 2.48 | 444 | Rodeo Avenue (east) | Northbound exit and entrance only | ||
| Rodeo Avenue (west; not a thru road) | Southbound exit and entrance only; connects to the Rodeo Trailhead at the Golden Gate NRA | ||||
| 3.33 | 445A | Sausalito (Bridgeway), Marin City (Donahue Street) | |||
| 4.46 | 445B | SR 1 north – Mill Valley, Stinson Beach | Northern end of SR 1 overlap; Mill Valley not signed southbound | ||
| Strawberry | 4.78 | 446 | Seminary Drive | ||
| | Redwood Highway Frontage Road (unsigned) | Southbound exit only | |||
| 5.70 | 447 |  SR 131 east (Tiburon Boulevard) / East Blithedale Avenue | |||
| Corte Madera | | Casa Buena Drive | Southbound entrance only | ||
| 7.37 | 449A | Paradise Drive, Tamalpais Drive | Signed as exit 449 northbound | ||
| 7.66 | 449B | Madera Boulevard | Southbound exit and entrance | ||
| 8.02 | 450A | Lucky Drive, Doherty Drive | Doherty Drive not signed northbound | ||
| Larkspur | 8.60 | 450B | San Anselmo, Richmond Bridge | Northbound signage | |
| Sir Francis Drake Boulevard | Southbound signage | ||||
| San Rafael | 9.63 | 451A | Andersen Drive, Francisco Boulevard | Southbound exit and entrance | |
| 10.00 | 451 |  Francisco Boulevard to I-580 east – Richmond Bridge | Northbound exit only | ||
| 451B | I-580 east – Richmond Bridge, Oakland | Southbound exit and northbound entrance; I-580 west exit 1A; former SR 17 south | |||
| 10.72 | 452 | Central San Rafael (Second Street, Mission Avenue) | |||
| 12.19 | 454A | Lincoln Avenue | No northbound exit | ||
| 12.69 | 454B | North San Pedro Road | Signed as exit 454 northbound | ||
| 13.71 | 455 | Freitas Parkway – Terra Linda | |||
| 14.10 | Terra Linda Weigh Station (northbound only)[300] | ||||
| 14.71 | 456 | Lucas Valley Road, Smith Ranch Road | |||
| 15.20 | St. Vincent's Weigh Station (southbound only)[300] | ||||
| | 15.57 | 457 | St. Vincent Drive, Miller Creek Road | ||
| Novato | 16.64 | 458 | Nave Drive | Northbound signage | |
| Alameda del Prado | Southbound signage | ||||
| 18.09 | 459 | Ignacio Boulevard, Bel Marin Keys Boulevard, Entrada Drive – Hamilton Field | Entrada Drive, Hamilton Field not signed northbound; signed as exits 459A (Bel Marin Keys Boulevard, Hamilton Field) and 459B (Ignacio Boulevard, Entrada Drive) southbound | ||
| 18.94 | 460 |  SR 37 east / South Novato Boulevard – Napa, Vallejo | Signed as exits 460A (SR 37) and 460B (South Novato Boulevard) northbound | ||
| R20.19 | 462A | Rowland Boulevard (US 101 Bus. north) | |||
| R21.11 | 462B | De Long Avenue | Serves Downtown Novato | ||
| R22.00 | 463 | Atherton Avenue, San Marin Drive (US 101 Bus. south) | |||
| | 26.90 | 467 | San Antonio Road, Silveira Ranch Road | ||
| Sonoma | | 2.94 | 472A | Petaluma Boulevard South (US 101 Bus. north), Kastania Road | |
| Petaluma | 3.58 | 472B |  SR 116 east – Sonoma, Napa | Southern end of SR 116 overlap | |
| 4.76 | 474 | East Washington Street – Central Petaluma | |||
| 5.76 | 476 | Old Redwood Highway, Petaluma Boulevard North (US 101 Bus. south) – Penngrove | |||
| | | Stony Point Road | Southbound entrance only | ||
| | 10.67 | 479 | Railroad Avenue | Northbound exit only | |
| Cotati | 12.00 | 481A | West Sierra Avenue | Northbound exit and southbound entrance | |
| 12.69 | 481B | SR 116 west (Gravenstein Highway) – Rohnert Park, Sebastopol, Cotati | Northern end of SR 116 overlap; signed as exit 481 southbound | ||
| Rohnert Park | 13.88 | 483 | Rohnert Park Expressway | ||
| 15.02 | 484A | Golf Course Drive, Wilfred Avenue | Signed as exit 484 southbound | ||
| | 15.53 | 484B | Santa Rosa Avenue (US 101 Bus. north) | Northbound exit and southbound entrance | |
| | 16.54 | 485 | Todd Road | ||
| Santa Rosa | 18.49 | 487 | Yolanda Avenue, Hearn Avenue | Yolanda Avenue not signed southbound | |
| 19.00 | 488A | Baker Avenue | Northbound signage | ||
| Corby Avenue, Santa Rosa Avenue | Southbound signage | ||||
| 19.66 | 488B |  SR 12 – Sebastopol, Sonoma | SR 12 west exits 7A-B, east exit 7 | ||
| 20.09 | 489 | Third Street – Downtown Santa Rosa | Third Street not signed southbound | ||
| 20.74 | 490 | College Avenue | |||
| 21.74 | 491A | Steele Lane, Guerneville Road | Signed as exit 491 southbound | ||
| 22.52 | 491B | Bicentennial Way | Northbound exit and southbound entrance | ||
| 22.81 | 492 | Mendocino Avenue (US 101 Bus. south), Old Redwood Highway, Hopper Avenue | Hopper Avenue not signed northbound; Old Redwood Highway not signed southbound | ||
| | 24.86 | 494 | River Road – Guerneville, Calistoga | ||
| | 25.90 | 495A | Fulton Road – Fulton | Closed after the reconstruction of the Airport Boulevard interchange[306] | |
| | 26.33 | 495 | Airport Boulevard, Fulton Road – Fulton | ||
| Windsor | 27.62 | 496 | Shiloh Road | ||
| 29.35 | 498 | Old Redwood Highway – Central Windsor | |||
| 30.67 | 499 | Arata Lane | No northbound entrance | ||
| Healdsburg | 33.48 | 502 | Healdsburg Avenue | Northbound signage | |
| Old Redwood Highway | Southbound signage | ||||
| 34.55 | 503 | Central Healdsburg (Healdsburg Avenue) | Northbound exit and southbound entrance | ||
| 34.88 | 504 | Westside Road – Guerneville | Southbound exit and northbound entrance | ||
| 36.27 | 505 | Dry Creek Road | |||
| | R38.56 | 507 | Lytton Springs Road, Alexander Valley Road | ||
| | R40.03 | 509 | Independence Lane | ||
| Geyserville | R41.43 | 510 |  Geyserville Avenue to SR 128 east – Geyserville | ||
| R43.37 | 512 | SR 128 east / Canyon Road (CR C1) – Geyserville, Calistoga | Southern end of SR 128 overlap | ||
| | R47.85 | 517 | Asti (Asti Road) | ||
| | R49.05 | 518 | Dutcher Creek Road – Stewarts Point | ||
| Cloverdale | R50.43 | 519 | South Cloverdale Boulevard (US 101 Bus. north, SR 128 Bus. west) | ||
| R51.62 | 520 | Citrus Fair Drive | |||
| | R53.40 | 522 | SR 128 west (US 101 Bus. south) – Fort Bragg, Mendocino | Northern end of SR 128 overlap | |
| Mendocino MEN R0.10-T106.80 | | 0.48 | 525 | Geysers Road | |
| | | Northern end of freeway | |||
| Hopland | 10.89 |  SR 175 east – Lakeport | |||
| | | Southern end of freeway | |||
| | 19.68 | 544 | Burke Hill Drive | ||
| | 20.71 | 545 | Cox-Shrader Road | ||
| | R21.59 | 546 |  SR 253 west – Ukiah, Boonville | ||
| Ukiah | R23.45 | 548A | Talmage (SR 222) | ||
| R24.06 | 548B | Gobbi Street | |||
| R24.53 | 549 | Perkins Street, Vichy Springs Road – Central Ukiah | |||
| R26.16 | 551 | North State Street – Ukiah | |||
| | 27.41 | 552 | Lake Mendocino Drive | ||
| | 30.43 | 555A | Calpella (Moore Street, Central Avenue) | ||
| | 30.83 | 555B |  SR 20 east – Upper Lake, Williams | Southern end of SR 20 overlap | |
| | R32.63 | 557 | West Road – Redwood Valley | ||
| | | Northern end of freeway | |||
| | 41.06[303] | Ridgewood Summit, elevation 1,956 feet (596 m)[303] | |||
| | 41.20 | Ridgewood Weigh Station (southbound only)[300] | |||
| | | Southern end of freeway | |||
| | | 568 | SR 20 west – Willits, Fort Bragg | Northern end of SR 20 overlap; former US 101 north | |
| | | 573 | North Main Street | Former US 101 south | |
| | | Northern end of freeway | |||
| | 58.90 | Moss Cove Rest Area (southbound only)[302] | |||
| Longvale | 59.31 |  SR 162 east – Covelo, Round Valley | |||
| | 61.82 | Irvine Lodge Road – Irvine Lodge Rest Area | No left turn from US 101 south | ||
| | 82.50 | Empire Camp Rest Area (northbound only)[302] | |||
| | | Southern end of freeway | |||
| | R84.69 | 609 |  SR 271 north | Former US 101 north | |
| South Leggett | R89.57 | 614 | South Leggett (SR 271) | Former US 101 | |
| | | Northern end of freeway | |||
| Leggett | T91.25 | SR 1 south – Leggett, Fort Bragg | Former SR 208 south | ||
| South Fork Eel River | R99.51– R100.02 | Confusion Hill Bridges | |||
| | | Southern end of freeway | |||
| Reynolds | R101.89 | 625 | SR 271 | Former US 101 | |
| Piercy | R103.81 | 627 | Piercy (SR 271) | Former US 101 | |
| Humboldt HUM T0.00-R137.44 | | | Northern end of freeway | ||
| Cooks Valley | T0.08 | SR 271 south – Piercy, Cooks Valley | Former US 101 south | ||
| | | Southern end of freeway | |||
| Benbow | R8.60 | 636 | Benbow (Lake Benbow Drive) | ||
| Garberville | R11.13 | 639A | Sprowel Creek Road (US 101 Bus. north) – Garberville | No northbound entrance | |
| R11.50 | 639B | Garberville, Redway (Redwood Drive) | No southbound entrance | ||
| | R14.31 | 642 | Redwood Drive (US 101 Bus. south) – Redway | ||
| | R17.91 | 645 | Avenue of the Giants (SR 254), Hooker Creek Road – Phillipsville | Hooker Creek Road not signed northbound; Avenue of the Giants not signed southbound | |
| | R22.44 | 650 | Miranda, Phillipsville (Maple Hills Road) | ||
| | 25.01 | 653 | Salmon Creek Road | ||
| Myers Flat | 27.94 | 656 | Myers Flat (SR 254) | ||
| | 33.22 | 661 | Weott (Newton Road) | ||
| | 35.70 | 663 | South Fork, Honeydew (SR 254) | ||
| | 39.16 | 667A | Avenue of the Giants (SR 254) | Southbound exit only | |
| | R39.67 | 667 | Redcrest, Holmes (Sorenson Road) | ||
| | R43.32 | 671 | Pepperwood, Redcrest, Holmes (Barkdull Road) | ||
| | R45.90 | 674 | Avenue of the Giants (SR 254), Jordan Road – Pepperwood | Avenue of the Giants not signed northbound; Jordan Road not signed southbound | |
| | R47.95 | 676 | Stafford Road | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| | R51.84 | 679 | Rio Dell, Scotia (SR 283, US 101 Bus. north) | ||
| Rio Dell | R52.60 | 680 | Davis Street | ||
| R53.38 | 681 | Wildwood Avenue (US 101 Bus. south) – Rio Dell | |||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| Fortuna | 57.69 | 685 |  SR 36 east – Hydesville, Bridgeville | Roger Rodoni Memorial Interchange[307] | |
| 59.50 | 687 | Kenmar Road (US 101 Bus. north), Riverwalk Drive | Riverwalk Drive not signed southbound | ||
| 60.49 | 688 | 12th Street | |||
| 61.53 | 689 | Main Street (US 101 Bus. south) | |||
| 62.23 | 690 | Palmer Boulevard | |||
| Fernbridge | 63.10 | 691 | Fernbridge, Ferndale (Fernbrige Drive to SR 211) | Northbound exit and southbound entrance | |
| 64.30 | 692 | Loleta, Fernbridge, Ferndale (SR 211) | |||
| | 65.95 | 694 | Loleta Drive | ||
| | 68.21 | 696 | Hookton Road – Loleta | ||
| Humboldt Hill | 70.61 | 698 | College of the Redwoods (Tompkins Hill Road) | ||
| 72.03 | 699 | Fields Landing (Orchard Avenue, Fields Landing Drive) | |||
| 72.88 | 700 | King Salmon Avenue | |||
| 73.72 | 701 | Humboldt Hill Road – Humboldt Hill | |||
| Eureka | 74.77 | 702 | Herrick Avenue, Elk River Road | ||
| | Northern end of freeway | ||||
| 79.17 |  SR 255 north (R Street) / Myrtle Avenue – Samoa | ||||
| Arcata | | Southern end of freeway | |||
| 85.03 | 712 | South G Street | Southbound exit and entrance | ||
| 85.83 | 713 | SR 255 south (Samoa Boulevard) – Arcata, Samoa, Sunny Brae | |||
| 86.50 | 714A | 14th Street – Humboldt State University | Northbound exit and southbound entrance | ||
| 86.94 | 714B | Sunset Avenue – Arcata, Humboldt State University | Signed as exit 714 southbound | ||
| 88.27 | 716A |  SR 299 east – Weaverville, Redding | Former US 299 | ||
| 88.80 | 716B | Giuntoli Lane, Janes Road | |||
| McKinleyville | R90.13 | 718 |  SR 200 east (North Bank Road) / Central Avenue (US 101 Bus. north) – McKinleyville | Central Avenue not signed southbound | |
| R91.47 | 719 | School Road | |||
| R93.00 | 721 | Murray Road | |||
| R93.85 | 722 | Arcata–Eureka Airport (Airport Road) | |||
| R95.62 | 723 | North Central Avenue (US 101 Bus. south) – McKinleyville | |||
| R97.02 | 725 | Crannell Road | |||
| | 98.07 | 726A | Westhaven Drive | Northbound exit and southbound entrance | |
| | 98.36 | 726B | 6th Avenue – Westhaven | Signed as exit 726 southbound | |
| Trinidad | 100.71 | 728 | Trinidad (North Westhaven Drive, Main Street) | ||
| | R102.90 | Southbound Trinidad Rest Area[302] | |||
| | R103.37 | 731 | Seawood Drive | ||
| | R105.20 | Northbound Trinidad Rest Area[302] | |||
| | R106.06 | 734 | Patricks Point Drive | ||
| | | Northern end of freeway | |||
| | | Southern end of freeway | |||
| | R126.09 | 753 | Newton B. Drury Scenic Parkway north | Former US 101 north | |
| Del Norte DN M0.00-46.49 | | R0.15 | 765 | Newton B. Drury Scenic Parkway south | Former US 101 south |
| | R3.56 | 768 | Klamath Beach Road (CR D8) | ||
| Klamath | R4.64 | 769 |  SR 169 east – Klamath, Terwer Valley | ||
| | Northern end of freeway | ||||
| | Requa Road (CR D7) / Minot Creek Road | ||||
| Crescent City | 25.84 | Elk Valley Road (CR D2) – Elk Valley Rancheria | |||
| 27.01 |  CR D3 (Northcrest Drive) | ||||
| | | Parkway Drive to Washington Boulevard | Northbound exit and entrance; interchange | ||
| | | Southern end of freeway | |||
| | R27.87 | 791 | Washington Boulevard (CR D1) | No northbound exit | |
| | R30.81 | 794 |     US 199 north (Redwood Highway north) to I-5 – Grants Pass | Northbound exit and southbound entrance; US 101 south transitions onto Redwood Highway south | |
| | | Northern end of freeway | |||
| | |  Elk Valley Cross Road (CR D2) to US 199 – Grants Pass | |||
| | | Lake Earl Drive (CR D3) – Pelican Bay State Prison | |||
| | 36.26 |  SR 197 south (North Bank Road) | |||
| | | Fred D. Haight Drive (CR D4) | |||
| Smith River | 39.83 | Fred D. Haight Drive (CR D4) – Smith River | |||
| | | Sarina Road, Ocean View Drive (CR D5) | |||
| Smith River Rancheria | | Mouth Smith River Road (CR D6) | |||
| | | Ocean View Drive (CR D5) | |||
| | 46.20 | Agricultural Inspection Station (southbound only) | |||
| | 46.49 |  US 101 north – Oregon Coast, Portland | Continuation into Oregon | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
| |||||
See also
Notes
- In California, the term "expressway" describes a divided highway with few cross-traffic points and no grade separations at intersections.[21]
- The HOV lanes on I-405 were longer before a portion was converted to HOT lanes.
- The approved plan extended US 101 to Olympia, Washington.
