Description for the Snake River (Washington)This section covers the Snake from the confluence with the Clearwater River to the confluence with the Columbia River.
The Snake River of the Pacific Northwest is the largest tributary of the Columbia River and stretches over 1,000 miles long. The river begins in northwest Wyoming and travels through the lower half of Idaho before turning North and forming the part of the border of Idaho and Oregon and Idaho and Washington before reaching Lewiston, Idaho where it forms with the Clearwater River and flows west into Washington to unite with the Columbia River at the Tri-Cities in Washington. The Snake River is known for having the deepest gorge in the world, Hell's Canyon, which reaches almost 8000 feet at its deepest points. Several hydroelectric power plants are positioned along the Snake for generating electricity. The Snake is mostly known for Salmon and Steelhead but is also populated with Smallmouth Bass, White Sturgeon, and numerous other species.