Minnesota · ranked from DNR surveys
Best largemouth bass lakes in Morrison County
The DNR has surveyed largemouth bass in 22 lakes in Morrison County. Of those, 15 earn a grade on this site, and the top 10 are ranked below. Grades come from survey catch rates, fish size and trophy history, scored the same way for every lake on the live map.
Alexander Lake is first at A. The DNR caught 73.8 largemouth bass per hour of electrofishing in the 2025 survey, and the biggest was 18 inches. Fish Trap Lake is second at A−, with 102.6 largemouth bass per hour of electrofishing in the 2025 survey, and 9% of its largemouth bass measured over 15 inches. Round Lake is third at A−, and its biggest largemouth bass was 19 inches.
| # | Lake | Grade | Acres | Survey catch rate | Over 15" | Biggest Surveyed | Avg wt | Surveyed |
|---|---|---|---|---|---|---|---|---|
| 1 | Alexander Lake | A | 2,709 | 73.8/hr in electrofishing | 24% | 18" | 1.4 lb | 2025 |
| 2 | Fish Trap Lake | A− | 1,164 | 102.6/hr in electrofishing | 9% | 17" | 0.6 lb | 2025 |
| 3 | Round Lake | A− | 127 | 95.8/hr in electrofishing | 28% | 19" | 0.9 lb | 2019 |
| 4 | Cedar Lake | B+ | 236 | 63.1/hr in electrofishing | 25% | 19" | 1.8 lb | 2025 |
| 5 | Round Lake | B | 104 | 68.6/hr in electrofishing | 16% | 20" | 1 lb | 2025 |
| 6 | Sullivan Lake | B | 1,103 | 15.2/hr in electrofishing | 63% | 19" | 2.3 lb | 2025 |
| 7 | Crookneck Lake | B | 191 | 29.2/hr in electrofishing | 55% | 19" | 1.3 lb | 2023 |
| 8 | Sylvan Lake | B− | 322 | — | 78% | 19" | 2.4 lb | 2024 |
| 9 | Placid Lake | B− | 538 | — | 100% | 18" | 3.2 lb | 2024 |
| 10 | Pierz Lake | C+ | 189 | — | 3% | 16" | 0.5 lb | 2022 |
Also ranked in Morrison County: Walleye · Northern pike · Smallmouth bass · Crappie · Bluegill · Yellow perch
All of Minnesota: Best largemouth bass 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.