Salmon River (Idaho) Salmon River (Idaho) The Salmon River is located in Idaho in the northwestern United States. The Salmon is also known as "The River of No Return". It flows for through central Idaho, draining a rugged, thinly populated watershed of and dropping more than between its headwaters, near Galena Summit above the Sawtooth Valley in the Sawtooth National Recreation Area, and its confluence with the Snake River. Measured at White Bird, its average discharge is per second. It is one of the largest rivers in the continental United States without a single dam on its mainstem. Cities located along the Salmon
Salmon River (Idaho) terrain in the contiguous United States. Exhibiting upwards of of vertical relief, the Salmon River canyons are some of the deepest in the U.S., surpassing the Grand Canyon and second only to the Snake River's Hells Canyon on the Idaho–Oregon border. Here, the river is joined by its two largest tributaries, the Middle Fork and South Fork. Ten miles (16 km) downstream (west) of its confluence with the Middle Fork, the Salmon River becomes the dividing line for the two time zones in Idaho: Mountain time to the south, Pacific time to the north, bisecting the state at approximately 45½