Lakes / Wyoming / Park County / Sill Lake
Sill Lake, Wyoming
5 acres
Surface Area
15 ft
Max Depth
5 ft
Average Depth
Where It Sits, and How Deep It Goes
Locator - Wyoming
44.93 degrees N, 109.59 degrees W - Park 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.
Depth Profile - Sill Lake
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Sill Lake Stacks Up
- Deeper than 25% of the 120 natural Wyoming lakes ranked by depth.
- Larger than 4% of the 783 lakes counted in Wyoming.
- A shallow lake - typical of most Wyoming lakes, which run under 20 ft at their deepest.
- About 38 miles from Cody, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Beartooth Lake | Park | 1.1 mi | 113 acres |
| Crane Lake | Park | 2.3 mi | 14 acres |
| Meadow Lake | Park | 2.4 mi | 2 acres |
| Island Lake | Park | 2.8 mi | 149 acres |
| Beauty Lake | Park | 2.8 mi | 94 acres |
| Night Lake | Park | 2.9 mi | 61 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Sill Lake
How Big Is Sill Lake?
Sill Lake covers 5 acres in Park County, Wyoming.
How Deep Is Sill Lake?
Sill Lake reaches 15 ft at its deepest. Its average depth is 5 ft.
What Is the Largest Lake in Park County?
Buffalo Bill Reservoir is the largest lake in Park County, at 6,691 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 56767087). Verified October 30, 2026.