| Grinnell Lake | |
| Pushpin Map: | USA Montana |
| Pushpin Map Caption: | Location in Montana |
| Coords: | 48.7658°N -113.7047°W |
| Inflow: | Grinnell Creek |
| Outflow: | Grinnell Creek (to Cataract Creek) |
| Basin Countries: | United States |
| Elevation: | 4944feet |
Grinnell Lake is located in Glacier National Park, in the U. S. state of Montana. Named after George Bird Grinnell, the lake has an opaque turquoise appearance from the rock flour (silt) which is transported to the lake from Grinnell Glacier. Grinnell Lake is accessible via the Grinnell Glacier Trail and is 3.2miles from the Many Glacier Hotel. It lies below the north face of Angel Wing.