Lakes / Wyoming / Converse County / Porcupine Reservoir
Porcupine Reservoir, Wyoming
50.9 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Wyoming
43.50 degrees N, 105.25 degrees W - Converse 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 Porcupine Reservoir Stacks Up
- Larger than 51% of the 783 lakes counted in Wyoming.
- About 70 miles from Casper, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Betty Reservoir | Converse | 13 mi | 93.09 acres |
| Nachtman Reservoir | Converse | 15 mi | 26.85 acres |
| Middle Creek Reservoir | Converse | 22 mi | 49.7 acres |
| Gumbo Lake | Campbell | 23 mi | 30.78 acres |
| Tailings Disposal Reservoir | Converse | 25 mi | 31.62 acres |
| Hay Lakes | Campbell | 26 mi | 141.43 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Porcupine Reservoir
How Big Is Porcupine Reservoir?
Porcupine Reservoir covers 50.9 acres in Converse County, Wyoming.
What Is the Largest Lake in Converse County?
La Prele Reservoir is the largest lake in Converse County, at 617.28 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 144773916). Verified October 30, 2026.