Catskill High Peaks

The 3,500-foot (1,067 m) elevation was chosen in the early 1950s when Dan Smiley, a descendant of the founders of Mohonk Mountain House and his fellow birders were trying to find the elusive Bicknell's thrush, which prefers to nest and breed in the boreal forests that predominate above that elevation in the Catskills. They drew up a list nearly identical to the one below and published it in a naturalists' journal.

A decade later hikers interested in peak bagging formed the Catskill Mountain 3500 Club, an organization similar to the better-known Adirondack 46ers, to promote the climbing of 34 of the 35 peaks listed below ("Southwest Hunter" was added to the list in 1992). The club implemented the peak-separation rule, modeled on the one already in use by the Appalachian Mountain Club. Prospective members are required to climb all (13 have no established route to the summit, requiring a bushwack) and then do Slide, Blackhead, Balsam and Panther mountains again in wintertime.

Today the New York State Department of Environmental Conservation enforces special rules for all the lands it manages in the Catskills above 3,500 ft (1,067 m), whether tiny plots such as on Rocky or vast ridgetops as on Plateau, Hunter and West Kill, due to the fragility of the ecosystems. In these areas, camping is permitted only in dire emergencies except during winter, when snow shields the earth somewhat, and open fires are banned. Almost all were designated bird conservation areas by Governor George Pataki in 1999, due to Bicknell's and other vulnerable species that return there in springtime to nest and breed.

Surveys of the Catskills date to the 1940s at the newest, and exact elevations have never been officially determined for many of these peaks. In those cases, their elevations are indicated by the highest 20 feet (6.096 m) contour shown on the United States Geological Survey (USGS) quadrangles with a plus (+) sign.

^a The name is currently unofficial. It refers to the peak that rises between Hunter and West Kill on the USGS Lexington quad

^b This refers not to "Bearpen Mountain" shown on the USGS Prattsville quad straddling the border between Delaware and Greene counties at 3,520 feet (1,070 m), but rather the unnamed higher area approximately one-half mile (800 m) to the southeast in Greene County.