| Lonesome Lake Peak | |
| Photo Alt: | A photo of Lonesome Lake Peak with Sapphire Lake viewed from the south flank of Calkens Peak |
| Elevation Ft: | 11302 |
| Prominence Ft: | 922 |
| Prominence Ref: | [1] |
| Parent Peak: | D. O. Lee Peak |
| Location: | Custer County, Idaho, U.S. |
| Range: | White Cloud Mountains |
| Map: | USA Idaho |
| Map Alt: | A map of Idaho showing the location of Lonesome Lake Peak |
| Coordinates: | 44.0754°N -114.6121°W |
| Topo: | USGS Boulder Chain Lakes |
| Easiest Route: | Simple scrambling, |
Lonesome Lake Peak, also known as Lonesome Peak, at 11302feet 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 2.07miles 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.[2]