Decker Peak, at 10,704 feet (3,263 m) above sea level is the third highest peak in the Sawtooth Range of Idaho. The peak is located in the Sawtooth Wilderness of Sawtooth National Recreation Area in Custer County. The peak is located 2.3 mi (3.7 km) south-southwest of Mount Cramer, its line parent. It is the 204th highest peak in Idaho.