Snake River — Snake River Canyon

About

Snake River, Wyoming — 1805 Lewis Clark Named, 1906-1912 Jackson Lake Dam, 1942 Ansel Adams, Grand Teton 80-mi. Long before survey crews or dam engineers, the Eastern Shoshone and Bannock peoples traversed the Snake River corridor through Jackson Hole for thousands of years, following bison herds and harvesting Yellowstone cutthroat trout. For them the river was a critical travel route, connecting the Snake River Plain to the Yellowstone Plateau. That pre-contact network of trails and fishing grounds set the human pattern along a corridor the river had already been carving for far longer.

The river entered the written record in 1805, when Lewis and Clark named it after the Snake, or Shoshone, Indians who dwelt in its valley. A Lewis and Clark journal entry from August 15, 1805 describes a river about six yards wide — a headwater trickle compared to the system it feeds. From those headwaters the Snake flows south and west, draining 3,570 square miles of Teton County across an 80-mile Wyoming segment that runs from Yellowstone through Jackson Hole to its confluence with the Snake River in Idaho. It is a tributary of the Columbia, and its watershed forms a key part of the larger Columbia River system.

Industry followed exploration. The watershed was logged from the 1830s through the 1920s, feeding the 1850–1910s regional timber industry and the 1860–1910s railroad expansion. Local sawmills, logging drives, and downstream lumber operations were the major operators. The era closed in stages: the 1910 exhaustion of the old-growth stands, the 1915 start of state forestry conservation, and the 1930s establishment of state forests ended large-scale logging.

Science arrived in 1872, when Ferdinand Hayden's geological survey documented the Snake River canyon below the Tetons and produced the first scientific descriptions of the river's hydrology and the dramatic Alpine Canyon gorge. Engineering came next: the Jackson Lake Dam, built between 1906 and 1912 as a 65-foot-tall structure and raised in 1916, defined the modern era of the upper basin. In 1942, Ansel Adams's photograph 'The Tetons and the Snake River, Grand Teton National Park, Wyoming' brought the river national attention.

Protection and paddling define the river today. The Snake was designated a National Wild and Scenic River in 1976, and in 2009 Congress designated portions of the Snake River headwaters above Jackson Lake as Wild & Scenic. The Alpine Canyon section remains a candidate for future designation, protected primarily by its location within the Bridger-Teton National Forest. The 1990s brought the Snake River Headwaters Restoration Project, part of a 1990s–2010s restoration chapter. The run itself divides cleanly: South Park to West Table is a 10-mile Class II warm-up with Teton views, West Table to Sheep Gulch delivers 8 miles of Class III–IV Alpine Canyon whitewater, and Sheep Gulch to Palisades Reservoir provides an 8-mile Class II cool-down. Recognized among the top 100 trout streams in the United States and supporting the Jackson, Moose, and Wilson economies, the Snake is worked commercially by outfitters like Dave Hansen Whitewater and Mad River Boat Trips.