Lonesome Lake Peak
 Lonesome Lake Peak also known as Lonesome Peak at 11302 feet (3445 m) above sea level is a peak in the White Cloud Mountains of Idaho. The peak is located in Sawtooth National Recreation Area in Custer County. The peak is located 2.07 mi (3.33 km) south-southeast of D. O. Lee Peak its line parent. It is the 68th highest peak in Idaho and rises above the west side of Lonesome Lake the uppermost of the Boulder Chain Lakes.