Grassy Lake Reservoir
| Reservoir Name | Grassy Lake |
| Dam Name | Grassy Lake |
| River | Grassy Creek |
| Administration City | Wyoming |
| Country | United States |
| Year | 1938 |
| Dam Height | 36 |
| Dam Length | 580 |
| Area(Sqkm) | 1.1 |
| Area(Polygonal) | 1.1 |
| Capital Expenditure | 18.7 |
| Depth(M) | 17 |
| Avg Displacement Of Water | 57 |
| Catchment Area In Sqkm | 8 |
| Main Usage | Irrigation |
| Status | 2: Good |
| Longitude | -110.81875 |
| Latitude | 44.129583 |
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