Lakes / Wyoming / Carbon County / Number 4 Evaporation Reservoir
Number 4 Evaporation Reservoir, Wyoming
66.08 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Wyoming
42.37 degrees N, 106.17 degrees W - Carbon 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 Number 4 Evaporation Reservoir Stacks Up
- Larger than 61% of the 783 lakes counted in Wyoming.
- About 34 miles from Casper, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Fresh Water Reservoir | Carbon | 1.2 mi | 29.02 acres |
| Bates Creek Reservoir | Natrona | 8.0 mi | 747.26 acres |
| Red Lake | Carbon | 14 mi | 33.04 acres |
| Big Charlie Lakes | Albany | 16 mi | 158.15 acres |
| Grinnell Lake | Carbon | 21 mi | 33.1 acres |
| Schnoor Reservoir | Natrona | 23 mi | 84.56 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Number 4 Evaporation Reservoir
How Big Is Number 4 Evaporation Reservoir?
Number 4 Evaporation Reservoir covers 66.08 acres in Carbon County, Wyoming.
What Is the Largest Lake in Carbon County?
Pathfinder Reservoir is the largest lake in Carbon County, at 22,000 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 115075867). Verified October 30, 2026.