Lakes in Elmore County, Idaho
10 lakes counted in Elmore County - the largest is Anderson Ranch Reservoir at 4,515.55 acres.
10
Lakes Counted
4,515.55 acres
Largest - Anderson Ranch Reservoir
Elmore County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Anderson Ranch Reservoir | Elmore | 4,515.55 acres | - |
| 2 | Arrowrock Reservoir | Elmore | 2,287.75 acres | - |
| 3 | Little Camas Reservoir | Elmore | 1,048.34 acres | - |
| 4 | Blair Trail Reservoir | Elmore | 177.67 acres | - |
| 5 | Long Tom Reservoir | Elmore | 100.89 acres | - |
| 6 | Lower Teapot Reservoir | Elmore | 64.25 acres | - |
| 7 | Upper Teapot Reservoir | Elmore | 46.54 acres | - |
| 8 | Cow Creek Reservoir | Elmore | 44.23 acres | - |
| 9 | Morrow Reservoir | Elmore | 43 acres | - |
| 10 | Big Trinity Lake | Elmore | 25.95 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.