Wenaha River
| Wenaha River | |
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| Name origin: Perhaps from a Cayuse language placename | |
| Country | United States |
|---|---|
| State | Oregon |
| County | Wallowa |
| Source | confluence of the river's north and south forks |
| - location | Wenaha–Tucannon Wilderness, Blue Mountains |
| - elevation | 2,807 ft (856 m) |
| - coordinates | 45°57′03″N 117°47′39″W / 45.95083°N 117.79417°W |
| Mouth | Grande Ronde River |
| - location | Troy |
| - elevation | 1,601 ft (488 m) |
| - coordinates | 45°56′44″N 117°27′07″W / 45.94556°N 117.45194°WCoordinates: 45°56′44″N 117°27′07″W / 45.94556°N 117.45194°W |
| Length | 21.6 mi (34.8 km) |
| Basin | 296 sq mi (767 km2) |
| Discharge | |
| - average | 390 cu ft/s (11 m3/s) |
  Location of the mouth of the Wenaha River in Oregon
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The Wenaha River is a tributary of the Grande Ronde River, about 22 miles (35 km) long, in the U.S. state of Oregon. The river begins at the confluence of its north and south forks in the Blue Mountains and flows east through the Wenaha–Tucannon Wilderness to meet the larger river at the small settlement of Troy. A designated Wild and Scenic River for its entire length, the stream flows wholly within Wallowa County.
The source of the North Fork Wenaha River is near 46°02′44″N 117°54′15″W / 46.0456°N 117.9043°W at 5,700 feet (1,700 m) in Washington State, while the South Fork Wenaha River source is near 45°52′31″N 117°56′15″W / 45.8752°N 117.9374°W at the same elevation in Oregon. From the confluence of the forks at 2,800 feet (850 m) in the Wenaha–Tucannon Wilderness within Umatilla National Forest, the Wenaha River flows generally east through the Blue Mountains of northeastern Oregon.
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