| Cosley Lake | |
| Location: | Glacier National Park, Glacier County, Montana, US |
| Coords: | 48.9223°N -113.7602°W[1] |
| Lake Type: | Natural |
| Inflow: | Mokowanis River |
| Outflow: | Mokowanis River |
| Basin Countries: | United States |
| Length: | 1.25miles |
| Width: | 0.35miles |
| Elevation: | 4842feet |
| Pushpin Map: | Montana#USA |
| Pushpin Map Alt: | Location of Cosley Lake in Montana, USA. |
Cosley Lake is located in Glacier National Park, in the U. S. state of Montana. Cosley Lake is northeast of Glenns Lake and between Bear Mountain to the north and Cosley Ridge to the south.[2]