The Sawtooth Valley is a valley about 30 miles (48 km) long in Blaine and Custer counties in central Idaho. It is located in Sawtooth National Recreation Area (SNRA), which is a part of Sawtooth National Forest. It is located between 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. The entire length of the valley is traversed by Idaho State Highway 75, which is also known as the Sawtooth Scenic Byway.
Highway 75 enters the valley from the south at Galena Summit and exits to the north near Stanley. Sawtooth Valley contains several large lakes in the SNRA, including Redfish, Alturas, Pettit, and Stanley lakes. Valley floor elevations range from just under 6,300 feet (1,900 m) near Stanley to over 7,500 feet (2,300 m) below Galena Summit. Elevations along the valley's borders reach 11,815 feet (3,601 m) at Castle Peak in the White Cloud Mountains to the east and 10,715 feet (3,266 m) at Thompson Peak in the Sawtooth Mountains to the west.