Independent site — not affiliated with or endorsed by the Pennsylvania Fish and Boat Commission (PFBC) or the PA Department of Environmental Protection (DEP). Official sources are linked on every page.

Armstrong County lakes

Southwest region

3 lakes and ponds in Armstrong County appear in PFBC or DEP data. 3 have their own page.

Lakes

Lake	Acres	Survey	2026 schedule	Advisory	Program
Crooked Creek Lake	350	2017	—	—	—
Keystone Lake	950	—	—	—	Big Bass Program
Mahoning Creek Lake	279	2018	—	—	—

On PFBC's 2026 trout schedule

No lake dates for Armstrong County on PFBC's 2026 schedule as published Oct 4, 2026.

Fish consumption advice (2026 list)

No lake-specific rows for Armstrong County lakes in the 2026 list.

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.”

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

Keystone Lake Big Bass Program — 2026 Fishing Summary, p. 11

Ice-fishing lakes

Crooked Creek Lake Largemouth Bass, Smallmouth Bass, panfish, Channel Catfish
Keystone Lake Largemouth Bass, Smallmouth Bass, Trout (stocked), panfish, Muskellunge, Walleye
Mahoning Creek Lake Largemouth Bass, Smallmouth Bass, panfish, Muskellunge, Northern Pike, Channel Catfish

This site has no ice reports; conditions change daily; never assume ice is safe.

Neighboring counties: Allegheny, Butler, Clarion, Indiana, Jefferson, Venango, Westmoreland

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.