Lakes / Wyoming / Washakie County / Flat Bottom Reservoir
Flat Bottom Reservoir, Wyoming
5 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Wyoming
43.75 degrees N, 107.40 degrees W - Washakie 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 Flat Bottom Reservoir Stacks Up
- Larger than 3% of the 783 lakes counted in Wyoming.
- About 82 miles from Casper, as the crow flies.
- 1 fish species on the WGFD list for this lake.
Fish Species
Species recorded for this lake. Presence only - no abundance ratings.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| C C Reservoir | Washakie | 1.4 mi | 6 acres |
| Big Cottonwood Reservoir | Washakie | 23 mi | 2 acres |
| Dullknife Reservoir | Johnson | 25 mi | 117.57 acres |
| Carothers Lake | Washakie | 27 mi | 30 acres |
| Renner Reservoir | Big Horn | 30 mi | 72 acres |
| Tensleep Reservoir | Big Horn | 30 mi | 182 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Flat Bottom Reservoir
How Big Is Flat Bottom Reservoir?
Flat Bottom Reservoir covers 5 acres in Washakie County, Wyoming.
What Fish Are in Flat Bottom Reservoir?
The WGFD lists Largemouth Bass for Flat Bottom Reservoir.
What Is the Largest Lake in Washakie County?
Carothers Lake is the largest lake in Washakie County, at 30 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: Wyoming Game & Fish lake data (ID 70653526). Verified October 30, 2026.