Ohanapecosh River
| Ohanapecosh River | |
 Silver Falls on the Ohanapecosh River in Mount Rainier National Park
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| Country | United States |
|---|---|
| State | Washington |
| Counties | Pierce, Lewis |
| Source | Mount Rainier |
| - location | Cascade Range |
| - elevation | 6,050 ft (1,844 m) |
| - coordinates | 46°50′0″N 121°39′26″W / 46.83333°N 121.65722°W |
| Mouth | Cowlitz River |
| - elevation | 1,230 ft (375 m) |
| - coordinates | 46°40′40″N 121°35′4″W / 46.67778°N 121.58444°WCoordinates: 46°40′40″N 121°35′4″W / 46.67778°N 121.58444°W |
| Length | 16 mi (26 km) |
| Basin | 68.5 sq mi (177.4 km2) |
| Discharge | for USGS gage 14224000 near Lewis, WA (historical: 1908-1912) |
| - average | 572.92 cu ft/s (16.22 m3/s) |
| - max | 7,500 cu ft/s (212.38 m3/s) |
| - min | 58 cu ft/s (1.64 m3/s) |
  Location of the mouth of the Ohanapecosh River in Washington
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The Ohanapecosh River (/oʊˈhænəpᵻkɒʃ/ oh-HAN-ə-pi-kosh) is a 16-mile (26 km)river in the U.S. state of Washington.
It is the main headwater tributary of the Cowlitz River, which begins at the confluence of the Ohanapecosh River and the Clear Fork Cowlitz River. The Ohanapecosh originates near Ohanapecosh Glacier on the southeast side of Mount Rainier. Most of the river is within Mount Rainier National Park. Its final reach is in Gifford Pinchot National Forest.
Mount Rainier is the source of nine major rivers and their tributaries: the Nisqually, Puyallup, Mowich, Carbon, West Fork White, Huckleberry, White, Ohanapecosh, and Muddy Fork rivers. Of these only the Ohanapecosh and Huckleberry are non-glacial. All of these rivers empty into Puget Sound near Tacoma, Washington, except the Muddy Fork and Ohanapecosh, which flow into the Cowlitz River, a tributary of the Columbia River.
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