Minnesota · DNR survey data
Willmert (main bay) Lake
Willmert (main bay) Lake covers 335 acres in Martin County, running to 8 feet, last surveyed by the DNR in 2019. The Minnesota DNR has not published bathymetry for this lake, so there is no depth map here, just the survey record: what the nets held and how big it ran.
Open Willmert (main bay) Lake in the live map → Write a report
DNR survey data
Fish species
WalleyeStocked · 2025Excellent numbers9.5per gill net11"Typical24"Biggest
Lengths measured · 82 fish
Recent · 2017 + 2018Lengths measured · 56 fish
2018Lengths measured · 26 fish
2017Lengths measured · 104 fish
2010Lengths measured · 13 fish
2001No recent survey rating.
No recent survey rating.
CrappieOne of the best around39.3per trap net8"Typical11"Biggest
Lengths measured · 376 fish
Recent · 2018Lengths measured · 376 fish
2018Lengths measured · 544 fish
2010Lengths measured · 6 fish
2001Only 6 fish measured that year — too few to read as a shape.
Lengths measured · 196 fish
1997Yellow perchExcellent numbers14.5per gill net6"Typical9"Biggest
Lengths measured · 65 fish
Recent · 2018Lengths measured · 65 fish
2018Lengths measured · 129 fish
2010Lengths measured · 164 fish
2001Lengths measured · 10 fish
1997No recent survey rating.
Rates come from standard DNR survey gear (gill nets, trap nets, electrofishing), judged against statewide benchmarks for the same gear — which is why the same number of fish per net can read differently for two species. Where the standard gear can't count a species reliably, the page shows presence and size only. Typical is the middle fish of those measured. Open a row for the full length spread, survey by survey. You can read every number on this page without an app or an account.
DNR stocking records
Stocking history
| Year | Species | Stocked |
|---|---|---|
| 2025 | Northern Pike | 680 fingerlings |
| 2025 | Walleye | 181,000 fry |
| 2023 | Walleye | 181,000 fry |
| 2021 | Northern Pike | 362 fingerlings |
| 2021 | Walleye | 181,000 fry |
| 2019 | Walleye | 181,000 fry |
| 2017 | Walleye | 181,000 fry |
| 2016 | Northern Pike | 986 fingerlings |
Recent reports
Willmert (main bay) Lake fishing reports
Recent reports on Willmert (main bay) Lake from guides, tournaments and regular anglers. Anything posted in the last two weeks also bumps the matching spots on the live map, so you'll see a "matches a recent report" tag on them.
Within 30 miles
Nearby lakes
- South Silver Lake · 252 ac · 2.9 mi
- Amber Lake · 182 ac · 3.2 mi
- Iowa Lake · 705 ac · 3.4 mi
- Hall Lake · 548 ac · 4.3 mi
- Bright Lake · 639 ac · 5 mi
- Budd Lake · 228 ac · 5.5 mi
- Okamanpeedan Lake · 2,268 ac · 5.5 mi
- East Chain Lake · 481 ac · 6 mi
Quick answers
Frequently asked questions
Is there a depth map for Willmert (main bay) Lake?
The Minnesota DNR has not published bathymetry for Willmert (main bay) Lake, so this page carries the survey record instead: species, catch rates and stocking history.
What fish are in Willmert (main bay) Lake?
The most recent DNR survey (2019) recorded walleye, largemouth bass, northern pike, bluegill, crappie, yellow perch, channel catfish.
Is Willmert (main bay) Lake stocked?
Yes. The DNR stocked northern pike and walleye in 2025; the stocking table on this page lists every year back to 2016.
When was Willmert (main bay) Lake last surveyed?
The Minnesota DNR last surveyed Willmert (main bay) Lake in 2019, the most recent of 8 surveys on record. A survey that old is a starting point, not a current reading.
Survey numbers are the Minnesota DNR's. How this site reads them →
Page updated .