Big Boy Peak, at 11,402 feet (3,475 m) above sea level is a peak in the Lemhi Range of Idaho. The peak is located in Butte County on the border of Caribou-Targhee National Forest and Salmon-Challis National Forest. It is about 0.75 mi (1.21 km) southeast of The Riddler and 1 mi (1.6 km) north of Shoshone John Peak. It is the 50th highest peak in Idaho.