Lakes / Utah / Millard County / Clay Knoll Reservoir
Clay Knoll Reservoir, Utah
33.85 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Utah
39.25 degrees N, 112.89 degrees W - Millard 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 Clay Knoll Reservoir Stacks Up
- Larger than 19% of the 298 lakes counted in Utah.
- About 94 miles from Provo, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Crafts Lake | Millard | 4.5 mi | 210.78 acres |
| Swan Lake Salt Marsh | Millard | 4.8 mi | 171 acres |
| Swan Lake | Millard | 4.9 mi | 223.88 acres |
| Carr Lake | Millard | 5.3 mi | 236.48 acres |
| Deep Lake | Millard | 8.5 mi | 37.56 acres |
| Salt Lake | Millard | 12 mi | 2,053.2 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Clay Knoll Reservoir
How Big Is Clay Knoll Reservoir?
Clay Knoll Reservoir covers 33.85 acres in Millard County, Utah.
What Is the Largest Lake in Millard County?
Sevier Lake is the largest lake in Millard County, at 122,527.82 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 120030593). Verified October 30, 2026.