| Gentian Lake | |
| Location: | Custer County, Idaho |
| Coords: | 44.0971°N -114.612°W |
| Lake Type: | Glacial |
| Outflow: | Big Boulder Creek to East Fork Salmon River |
| Basin Countries: | United States |
| Length: | 100m (300feet) |
| Width: | 80m (260feet) |
| Elevation: | 3060m (10,040feet) |
| Pushpin Map: | Idaho#USA |
| Pushpin Map Alt: | Location of Gentian Lake in Idaho, USA. |
Gentian Lake is an alpine lake in Custer County, Idaho, United States, located in the White Cloud Mountains in the Sawtooth National Recreation Area. Although no trails lead to the lake, it can be accessed from Sawtooth National Forest trail 601.[1]
Gentian Lake is southeast of D. O. Lee Peak, upstream of Cove Lake, and in the same basin as Boulder and Snow Lakes.