Minnesota · ranked from DNR surveys
Best walleye lakes in Mahnomen County
The DNR has surveyed walleye in 11 lakes in Mahnomen County. The 8 ranked below are the ones that earn a grade on this site. Grades come from survey catch rates, fish size and trophy history, scored the same way for every lake on the live map.
Tulaby Lake is first at A. The DNR caught 27.6 walleye per gill net in the 2025 survey, and the biggest was 28 inches. Little Vanose Lake is second at A−, with 132 walleye per gill net in the 2017 survey, and none of its walleye measured over 20 inches. South Twin Lake is third at B+, and its biggest walleye was 25 inches.
| # | Lake | Grade | Acres | Survey catch rate | Over 20" | Biggest Surveyed | Avg wt | Surveyed |
|---|---|---|---|---|---|---|---|---|
| 1 | Tulaby Lake | A | 832 | 27.6/net in gill nets | 12% | 28" | 1.2 lb | 2025 |
| 2 | Little Vanose Lake | A− | 143 | 132/net in gill nets | 0% | 14" | 0.4 lb | 2017 |
| 3 | South Twin Lake | B+ | 1,127 | 4.3/net in gill nets | 24% | 25" | 2 lb | 2024 |
| 4 | Roy Lake | B+ | 695 | 4.7/net in gill nets | 14% | 27" | 1.7 lb | 2023 |
| 5 | Island Lake | B+ | 616 | 3.8/net in gill nets | 47% | 27" | 2.8 lb | 2025 |
| 6 | Snider Lake | B | 634 | 3.2/net in gill nets | 20% | 30" | 2 lb | 2023 |
| 7 | Bass Lake | B− | 735 | 3.3/net in gill nets | 19% | 22" | 1.8 lb | 2022 |
| 8 | North Twin Lake | B− | 966 | 1.9/net in gill nets | 20% | 28" | 2.3 lb | 2024 |
Also ranked in Mahnomen County: Northern pike · Largemouth bass · Crappie · Bluegill · Yellow perch
All of Minnesota: Best walleye lakes in Minnesota
Grades are based on Minnesota DNR survey data: how many fish the DNR caught (scaled by lake size), how many reached quality size, and the biggest fish measured. Each lake's page has the numbers behind its grade. The table shows each lake's most recent survey year.