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Brood Stock Lakes Program — 2026 Fishing Summary, p. 15
PFBC Best Fishing Waters
Common Carp, Bullhead catfish, Largemouth Bass, Walleye — list of Nov 2024
Latest PFBC survey
April 2024 (2 years ago)
On the 2026 trout schedule
No (as published Oct 4, 2026)
Fish-consumption advisory
No lake-specific row in the 2026 list
Ice-fishing list
On PFBC's ice-fishing destination list (retrieved Oct 4, 2026)
Lake Wilhelm covers 1,739 acres in Mercer County, in a state park. PFBC biologists last reported on it in April 2024. The 2026 advisory has no lake-specific row for it; the statewide one-meal-a-week advice applies.
What PFBC biologists found
Apr 2024 survey · 2 years ago
PFBC biologist report
Gear: trap nets, night electrofishing, boat electrofishing
Trap nets captured 100 Walleye at 0.16 fish per net hour. (p. 3)
Findings are our short summaries of one survey at one time. Every number was checked against the cited page of PFBC's report. We don't rate lakes.
On PFBC's 2026 trout-stocking schedule
Lake Wilhelm is not on PFBC's 2026 adult trout schedule (as published Oct 4, 2026).
Fish consumption advice (2026 list)
No lake-specific advice for Lake Wilhelm 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.”
From April 1 through May 31, Muskellunge, Tiger Muskellunge, Northern Pike and pickerel are catch and release only; none may be kept. Other species follow Commonwealth inland waters rules.
Check posted rules and current conditions before you go.
On PFBC's ice-fishing destination list (retrieved Oct 4, 2026). Species PFBC lists for ice fishing here: Largemouth Bass, panfish, Muskellunge, Walleye, Channel Catfish.
This site has no ice reports; conditions change daily; never assume ice is safe.
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The 2026 advisory has no lake-specific row for Lake Wilhelm. The statewide advice — no more than one meal (1/2 pound) a week of sport fish — still applies. Not medical advice.
What fish are in Lake Wilhelm?
PFBC's April 2024 survey recorded: Black Crappie, Bluegill, Brown Bullhead, Largemouth Bass, Yellow Bullhead, Muskellunge, Pumpkinseed, Gizzard Shad, Channel Catfish, Yellow Perch, White Crappie, Walleye, Common Carp, White Sucker, Golden Shiner, Bowfin, Green Sunfish. Surveys record what biologists caught with their gear on those days, not everything in the lake.