| Upper Grinnell Lake | |
| Coords: | 48.7592°N -113.7325°W[1] |
| Type: | Natural |
| Outflow: | Grinnell Creek |
| Basin Countries: | United States |
| Elevation: | 6463feet |
| Pushpin Map: | Montana#USA |
| Pushpin Map Alt: | Location of Upper Grinnell Lake in Montana, USA. |
Upper Grinnell Lake is located in Glacier National Park, in the U. S. state of Montana.[2] Upper Grinnell Lake is a proglacial lake which formed in the 1930s as Grinnell Glacier retreated. The lake is often filled with small icebergs which have been breaking off Grinnell Glacier. Upper Grinnell Lake can be reached by trail and is a 5.5miles hike from the Many Glacier Hotel.[3]