The Sawtooth Valley is a valley in the Western United States, in Blaine and Custer counties of central Idaho. About 30 miles (50 km) long, it is in Sawtooth National Recreation Area (SNRA) in the Sawtooth National Forest. It is surrounded by the Sawtooth Mountains to the west, White Cloud Mountains to the east, Salmon River Mountains to the north, and Boulder and Smoky Mountains to the south. The valley contains the headwaters of the Salmon River, the city of Stanley, and community of Sawtooth City. In 2017, the Sawtooth Valley was designated part of the Central Idaho Dark Sky Reserve.