| Lost Lake | |
| Location: | Desolation Wilderness El Dorado County, California |
| Coords: | 38.8605°N -120.0974°W |
| Basin Countries: | United States |
| Area: | 0.71NaN1 |
| Depth: | 1.9m (06.2feet) |
| Volume: | 12500m2 |
| Elevation: | 2475m (8,120feet) |
| Frozen: | November–June |
| Pushpin Map: | California#USA |
| Pushpin Map Alt: | Location of Lost Lake in California, USA. |
Lost Lake is a lake in the Desolation Wilderness in the Sierra Nevada, south of Lake Tahoe in El Dorado County, California, United States.
Not to be confused with Lost Lake Resort, which is near the Colorado River. Also not to be confused with the 'Lost Lake' off the Cajon Pass, also in California.