Lakes / Montana / Fallon County
Lakes in Fallon County, Montana
3 lakes counted in Fallon County - the largest is South Sandstone Reservoir at 114 acres.
3
Lakes Counted
114 acres
Largest - South Sandstone Reservoir
Fallon County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | South Sandstone Reservoir | Fallon | 114 acres | About 20 ft |
| 2 | Lake Baker | Fallon | 90 acres | - |
| 3 | Rush Hall Reservoir | Fallon | 8 acres | - |
Sources: Montana Fish, Wildlife & Parks lake data; USGS. Verified October 30, 2026.