Portage River (Jackson County, Michigan)
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CountryUnited States
elevation
909 feet (277 m)[1]| Portage River | |
|---|---|
_Map_US_MI.svg) | |
| Location | |
| Country | United States |
| Physical characteristics | |
| Source | |
| • location | Waterloo Township, Jackson County, Michigan |
| Mouth | |
• location | Grand River in Blackman Charter Township, Jackson County, Michigan |
• elevation | 909 feet (277 m)[1] |
| Length | 15.5 mi (24.9 km) |
| Discharge | |
| • location | mouth |
| • average | 148.54 cu ft/s (4.206 m3/s) (estimate)[2] |
The Portage River is a 15.5-mile-long (24.9 km)[3] river in the U.S. state of Michigan, flowing mostly southwesterly through northeast Jackson County.
The Portage River rises at approximately 42°22′26″N 84°10′48″W / 42.37389°N 84.18000°W in the Portage Lake Swamp in the Waterloo State Recreation Area. The river flows mostly southwest into the Grand River at 42°18′54″N 84°23′42″W / 42.31500°N 84.39500°W in Blackman Charter Township just north of the city of Jackson.[1] The Portage River forms the boundary between the townships of Henrietta and Leoni.