Lakes / Pennsylvania / Westmoreland County
Lakes in Westmoreland County, Pennsylvania
15 lakes counted in Westmoreland County - the largest is Beaver Run Reservoir at 1,125 acres.
15
Lakes Counted
1,125 acres
Largest - Beaver Run Reservoir
Westmoreland County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Beaver Run Reservoir | Westmoreland | 1,125 acres | None |
| 2 | Loyalhanna Lake | Westmoreland | 479 acres | None |
| 3 | Latrobe Reservoir | Westmoreland | 129.7 acres | None |
| 4 | Donegal Lake | Westmoreland | 90 acres | None |
| 5 | Keystone Lake (State Park) | Westmoreland | 78 acres | About 25 ft |
| 6 | Bridgeport Reservoir | Westmoreland | 70 acres | None |
| 7 | Tubmill Reservoir | Westmoreland | 39.3 acres | None |
| 8 | Ethel Springs Lake | Westmoreland | 34.1 acres | None |
| 9 | Twin Lakes Number One Reservoir (lower) | Westmoreland | 30 acres | None |
| 10 | Mammoth Dam | Westmoreland | 27 acres | None |
| 11 | Acme Dam | Westmoreland | 24 acres | None |
| 12 | Twin Lakes Number Two Reservoir -upper twin lake | Westmoreland | 20 acres | None |
| 13 | Northmoreland Lake | Westmoreland | 17 acres | None |
| 14 | Indian Lake | Westmoreland | 5 acres | None |
| 15 | Lower Burrel Park Pond (Holtzhauer Lake) | Westmoreland | 4 acres | None |
Sources: Pennsylvania Fish and Boat Commission lake data; USGS. Verified October 28, 2026.