The Wenaha River is a 22 miles (35.4 km) river in the Wenaha–Tucannon Wilderness in the U.S. state of Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

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The river begins at the Wenaha Forks, where the North and South Fork Wenaha Rivers join. It then flows east for about 22 miles (35.4 km) to the small settlement of Troy

Troy, Oregon

Troy is an unincorporated community in rural Wallowa County, Oregon, United States at the conflux of the Grande Ronde and Wenaha rivers and Courtney Creek. Troy is west of Flora on Oregon Route 3 close to the Washington state line. It is known for its excellent river fishing, and has an RV park and...

 where it meets the Grande Ronde River

Grande Ronde River

The Grande Ronde River is a tributary of the Snake River, long, in northeastern Oregon and southeastern Washington in the United States. It drains an area southeast of the Blue Mountains and northwest of the Wallowa Mountains, on the Columbia Plateau...

. Most of the Wenaha watershed is rugged and steep, with mostly unpopulated mountain peaks and gorges.