Thompson Peak, at 10,751 feet (3,277 m) above sea level is the highest peak in the Sawtooth Range of Idaho. The summit of Thompson Peak is located within Custer County, although some of the lower portion of the mountain is in Boise County. Thompson Peak is also located within the Sawtooth Wilderness portion of the Sawtooth National Recreation Area, a unit of Sawtooth National Forest. The town of Stanley, Idaho is about 6 miles (9.7 km) northeast of Thompson Peak.
Redfish Lake, Little Redfish Lake, and the visitor services at these locations are only a few miles from Thompson Peak. Directly to the north is neighboring Williams Peak, while Mickey's Spire is 0.24 miles (0.39 km) to the south-southwest.
There are a total of four routes to the top of Thompson Peak: South Couloir - class 3,…