Lakes / Utah / Duchesne County / Upper Stillwater Reservoir
Upper Stillwater Reservoir, Utah
294.32 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Utah
40.57 degrees N, 110.70 degrees W - Duchesne County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Upper Stillwater Reservoir Stacks Up
- Larger than 76% of the 298 lakes counted in Utah.
- About 42 miles from Park City, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Kidney Lake | Duchesne | 4.9 mi | 189.28 acres |
| Island Lake | Duchesne | 5.6 mi | 66.47 acres |
| Brown Duck Lake | Duchesne | 5.7 mi | 31.88 acres |
| Grandaddy Lake | Duchesne | 5.7 mi | 168.28 acres |
| Betsy Lake | Duchesne | 6.5 mi | 32.87 acres |
| Mohawk Lake | Duchesne | 6.9 mi | 47.44 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Upper Stillwater Reservoir
How Big Is Upper Stillwater Reservoir?
Upper Stillwater Reservoir covers 294.32 acres in Duchesne County, Utah.
What Is the Largest Lake in Duchesne County?
Starvation Reservoir is the largest lake in Duchesne County, at 2,991.46 acres.
Largest Lakes in Utah
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Great Salt Lake | Box Elder | 925,981.5 acres | - |
| 2 | Lake Powell | Kane | 128,544.01 acres | - |
| 3 | Sevier Lake | Millard | 122,527.82 acres | - |
| 4 | Utah Lake | Utah | 91,155.46 acres | - |
| 5 | Bear Lake | Rich | 70,008.54 acres | - |
All 298 Utah lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 58227538). Verified October 30, 2026.