Middle Fork Salmon River

About

Middle Fork Salmon River, Idaho — 1968 One of Original 8 W&S. The people who first built a life in this canyon were the Bannock Tuka-Deka, known to history as the Big Horn Sheepeaters, whose pictographs and pithouse depressions remain visible on the canyon walls. They shared a larger watershed with the Nez Perce, the Shoshone-Paiute, the Coeur d'Alene, the Kootenai, and the Northern Paiute, who used the river as a primary travel corridor, fishing ground, and gathering place. Those relationships were formalized through the 1855 Treaty of Walla Walla, the 1863 Treaty of the Oregon Trail, and the 1867 treaty that followed. The Sheepeater presence ended in force: between 1879 and 1880, the U.S. Army's Sheepeater Campaign became the last armed conflict between the military and a Native American tribe in Idaho.

The first documented U.S. exploration came with David Thompson, who traveled the upper Salmon and the Middle Fork between 1809 and 1811. Extraction followed within decades. Gold mining worked the Middle Fork basin from 1860 through 1910, and logging ran alongside it from the 1860s into the 1920s, supplying white pine, Douglas fir, and cedar to the Oregon Short Line and Northern Pacific railway expansions and to Idaho's silver and lead mines. By 1910 the white-pine stands were exhausted. State forestry conservation began in 1915, and the creation of the Boise, Caribou, and Sawtooth National Forests through the 1920s brought large-scale logging to an end.

The most consequential decision for the river's fish came from outside the basin. Between 1955 and 1967, three Hells Canyon dams on the Snake River blocked the anadromous runs that Salmon-basin fish had followed to the ocean and back for generations — a barrier no wilderness designation upstream could undo.

Preservation defined the river's next chapter. On October 2, 1968, Congress named the Middle Fork of the Salmon among the original eight rivers designated under the Wild and Scenic Rivers Act, protecting 103 miles. Twelve years later, the 1980 creation of the 2.3-million-acre Frank Church–River of No Return Wilderness enclosed roughly eighty miles of the river within one of the largest protected wildlands in the lower forty-eight. The Middle Fork runs today without a dam along its length and without a road piercing its canyon, and the Middle Fork Conservation effort of 2010 to 2024 has protected 99 percent of the watershed from development. It is counted among the cleanest large rivers in the country.

For paddlers, the river is a wilderness expedition rather than a day trip: more than a hundred rapids of Class III-IV water across a hundred roadless miles. USGS gauge 13309220 records an average flow of 1,454 cubic feet per second, with an optimal running window between 725 and 2,200 CFS. The corridor remains a premier steelhead, salmon, and trout fishery. Since 2015, the Idaho Department of Water Resources — working with the Shoshone-Paiute Tribes and the Nez Perce Tribe — has pursued streambank stabilization, native fish restocking of salmon, steelhead, and bull trout, and a broader Idaho salmon recovery program running from 2020 to 2024.