Lakes / Wyoming / Teton County / Grassy Lake Reservoir
Grassy Lake Reservoir, Wyoming
311.11 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Wyoming
44.13 degrees N, 110.81 degrees W - Teton County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Wyoming Game and Fish Department coordinates, not by eye. Schematic - not a survey map.
How Grassy Lake Reservoir Stacks Up
- Larger than 90% of the 783 lakes counted in Wyoming.
- About 45 miles from Jackson, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake of the Woods | Teton | 2.3 mi | 174.95 acres |
| Hering Lake | Teton | 2.6 mi | 75.99 acres |
| Beula Lake | Teton | 3.0 mi | 131.09 acres |
| Fish Lake | Teton | 6.5 mi | 30.89 acres |
| Loon Lake | Teton | 7.1 mi | 44.48 acres |
| Winegar Lake | Teton | 7.7 mi | 29.41 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Grassy Lake Reservoir
How Big Is Grassy Lake Reservoir?
Grassy Lake Reservoir covers 311.11 acres in Teton County, Wyoming.
What Is the Largest Lake in Teton County?
Yellowstone Lake is the largest lake in Teton County, at 84,442 acres.
Deepest Natural Lakes in Wyoming
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Deep Lake | Park | 285 acres | 472 ft |
| 2 | Lake Reno | Park | 107 acres | 222 ft |
| 3 | Snowdrift Lake | Teton | 57 acres | 174 ft |
| 4 | Crater Lake | Big Horn | 39 acres | 166 ft |
| 5 | Beauty Lake | Park | 94 acres | 165 ft |
All 120 Wyoming lakes ranked by depth
Largest Lakes in Wyoming
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Yellowstone Lake | Teton | 84,442 acres | - |
| 2 | Flaming Gorge Reservoir | Sweetwater | 38,888.36 acres | 440 ft |
| 3 | Jackson Lake | Teton | 26,853.22 acres | - |
| 4 | Pathfinder Reservoir | Carbon | 22,000 acres | 192 ft |
| 5 | Seminoe Reservoir | Carbon | 20,000 acres | 200 ft |
All 783 Wyoming lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 52361421). Verified October 30, 2026.