| Lake Janet | |
| Coords: | 48.9442°N -113.9442°W[1] |
| Type: | Natural |
| Inflow: | Olson Creek |
| Outflow: | Olson Creek |
| Basin Countries: | United States |
| Elevation: | 4924feet |
| Pushpin Map: | Montana#USA |
| Pushpin Map Alt: | Location of Lake Janet in Montana, USA. |
Lake Janet is located in Glacier National Park, in the U. S. state of Montana. Lake Janet is south of Olson Mountain, north of Porcupine Ridge, northwest of Citadel Peaks, and southwest of Waterton Lake.[2]