Westmoreland County lakes
Southwest region
18 lakes and ponds in Westmoreland County appear in PFBC or DEP data. 12 have their own page.
Lakes
| Lake | Acres | Survey | 2026 schedule | Advisory | Program |
|---|---|---|---|---|---|
| Acme Dam | 24 | 2021 | — | — | — |
| Beaver Run Reservoir | 1,125 | — | — | 2026 list | Closed to fishing |
| Bridgeport Reservoir | 70 | 2022 | — | — | Big Bass Program, Panfish Enhancement Special Regulations |
| Donegal Lake | 90 | — | 4 dates | — | Miscellaneous Special Regulations |
| Indian Lake | 4.9 | — | 4 dates | — | Big Bass Program, Panfish Enhancement Special Regulations |
| Keystone Lake (State Park) | 78 | 2017 | 4 dates | — | Big Bass Program |
| Lower Burrel Park Pond (Holtzhauer Lake) | 4.0 | 2018 | — | — | Catch and Release Lakes |
| Lower Hunt's Spring Pond | 0.1 | — | — | — | — |
| Loyalhanna Lake | 479 | 2018 | — | — | — |
| Mammoth Dam | 27 | 2019 | 4 dates | — | Big Bass Program |
| Northmoreland Lake | 17 | 2012 | 4 dates | — | Big Bass Program, Panfish Enhancement Special Regulations |
| Penn Township Municipal Park Pond | 1.4 | — | — | — | — |
| Remaley Pond | 0.3 | — | — | — | — |
| Roaring Rn Nat Area Pd | 1.0 | — | — | — | — |
| Saint Vincent Lake | 11 | — | — | — | — |
| Twin Lakes Number One Reservoir (Lower) | 30 | 2019 | 4 dates | — | Big Bass Program, Panfish Enhancement Special Regulations |
| Twin Lakes Number Two Reservoir (Upper Twin Lake) | 20 | 2018 | 3 dates | — | Big Bass Program, Panfish Enhancement Special Regulations |
| Unity Township Pond | 3.4 | — | — | — | — |
On PFBC's 2026 trout schedule
2026 schedule · as published OCT 4
As published Oct 4, 2026 · subject to change. PFBC schedule
Earlier dates (27, was scheduled)
- Was scheduled for Feb 23, 2026 · Keystone Lake (State Park)
- Was scheduled for Feb 24, 2026 · Donegal Lake
- Was scheduled for Mar 2, 2026 · Indian Lake
- Was scheduled for Mar 4, 2026 · Mammoth Dam
- Was scheduled for Mar 10, 2026 · Northmoreland Lake
- Was scheduled for Mar 17, 2026 · Twin Lakes Number Two Reservoir (Upper Twin Lake)
- Was scheduled for Mar 17, 2026 · Twin Lakes Number One Reservoir (Lower)
- Was scheduled for Apr 10, 2026 · Mammoth Dam
- Was scheduled for Apr 10, 2026 · Indian Lake
- Was scheduled for Apr 11, 2026 · Donegal Lake
- Was scheduled for Apr 14, 2026 · Twin Lakes Number One Reservoir (Lower)
- Was scheduled for Apr 14, 2026 · Twin Lakes Number Two Reservoir (Upper Twin Lake)
- Was scheduled for Apr 16, 2026 · Northmoreland Lake
- Was scheduled for Apr 16, 2026 · Keystone Lake (State Park)
- Was scheduled for Apr 21, 2026 · Twin Lakes Number One Reservoir (Lower)
- Was scheduled for Apr 21, 2026 · Mammoth Dam
- Was scheduled for Apr 27, 2026 · Keystone Lake (State Park)
- Was scheduled for Apr 27, 2026 · Northmoreland Lake
- Was scheduled for May 4, 2026 · Indian Lake
- Was scheduled for May 4, 2026 · Donegal Lake
- Was scheduled for Oct 13, 2026 · Indian Lake
- Was scheduled for Oct 13, 2026 · Mammoth Dam
- Was scheduled for Oct 14, 2026 · Donegal Lake
- Was scheduled for Oct 14, 2026 · Twin Lakes Number One Reservoir (Lower)
- Was scheduled for Oct 14, 2026 · Twin Lakes Number Two Reservoir (Upper Twin Lake)
- Was scheduled for Oct 16, 2026 · Keystone Lake (State Park)
- Was scheduled for Oct 16, 2026 · Northmoreland Lake
County lake calendar Add these dates to your calendar
Fish consumption advice (2026 list)
| Lake | Species | Meal advice | Contaminant |
|---|---|---|---|
| Beaver Run Reservoir (Westmoreland Co.) | Largemouth Bass | 2 meals/month | Mercury |
Statewide advice: “Pennsylvania has issued a general, statewide health advisory for recreationally caught sport fish: eat no more than one meal (1/2 pound) per week of sport fish caught in the state’s waterways.”
“People who regularly eat sport fish, women of childbearing age and children are particularly susceptible to contaminants that build up over time.”
“Fish stocked from PFBC state fish hatcheries are subject to the blanket one-meal-per-week consumption advisory that applies to recreationally caught sport fish in Pennsylvania.”
DEP: “The advisory listing was current at the time this summary went to press. Fish consumption advisories may have been issued or lifted since that time.”
Special-regulation programs
- Beaver Run Reservoir
- Bridgeport Reservoir
- Donegal Lake
- Indian Lake
- Keystone Lake (State Park)
- Lower Burrel Park Pond (Holtzhauer Lake)
- Mammoth Dam
- Northmoreland Lake
- Twin Lakes Number One Reservoir (Lower)
- Twin Lakes Number Two Reservoir (Upper Twin Lake)
Ice-fishing lakes
- Acme Dam
- Bridgeport Reservoir
- Keystone Lake (State Park)
- Loyalhanna Lake
- Mammoth Dam
- Northmoreland Lake
- Twin Lakes Number One Reservoir (Lower)
- Twin Lakes Number Two Reservoir (Upper Twin Lake)
This site has no ice reports; conditions change daily; never assume ice is safe.
Neighboring counties: Allegheny, Armstrong, Butler, Cambria, Fayette, Indiana, Somerset, Washington
Sources: PFBC Lakes_Point (Oct 4, 2026); PFBC adult trout schedule (as published Oct 4, 2026); DEP/PFBC advisory (2026 list); PFBC special-regulation data (Mar 2026). Last data import Oct 5, 2026.