Willmert Lake (Main Bay)

Details

DNR lake ID

46001401

County

Martin

Surface area

335 acres

Maximum depth

8 feet

Shallow water (littoral) area

335 acres, 100% of the lake

Shoreline

3.3 miles

Average water clarity

0.8 feet (Secchi disk, 2 readings)

Latest DNR fish survey

June 2019, targeted survey

Surveys on record

8, since 1990

Game fish caught in the 2019 survey

yellow perch 2,849, orangespotted sunfish 13, white crappie 9, black crappie 3, largemouth bass 2

Fish species recorded

black crappie, bluegill, channel catfish, crappie, largemouth bass, northern pike, orangespotted sunfish, walleye, white crappie, yellow perch, and 10 other species

Stocked in 2025

northern pike fingerlings (680); walleye fry (181,000)

Stocked in 2023

walleye fry (181,000)

Stocked in 2021

northern pike fingerlings (362); walleye fry (181,000)

Stocking years on record

6 of the last 10 (2016 to 2025)

Public accesses (DNR survey record)

1, owned by DNR

Fish consumption

Follow the statewide guidelines; fish from this lake have not been tested

Size

100 to 499 acres

Deepest point

Under 15 feet

Public access

Yes

Stocked in the last 3 years

Yes

Sources

• Minnesota DNR LakeFinder
  Checked September 24, 2026

Survey catches show what DNR nets and electrofishing found on the survey date, not how the fishing is today. Check the current regulations and the Department of Health advice before you keep fish, and confirm access conditions before you tow a boat.