Minnesota · ranked from DNR surveys
Best largemouth bass lakes in Isanti County
The DNR has surveyed largemouth bass in 15 lakes in Isanti County. Of those, 11 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.
Green Lake is first at A. The DNR caught 104.9 largemouth bass per hour of electrofishing in the 2025 survey, and the biggest was 19 inches. Fannie Lake is second at A−, with 70.3 largemouth bass per hour of electrofishing in the 2022 survey, and 22% of its largemouth bass measured over 15 inches. Lory Lake is third at A−, and its biggest largemouth bass was 20 inches.
| # | Lake | Grade | Acres | Survey catch rate | Over 15" | Biggest Surveyed | Avg wt | Surveyed |
|---|---|---|---|---|---|---|---|---|
| 1 | Green Lake | A | 833 | 104.9/hr in electrofishing | 26% | 19" | 1 lb | 2025 |
| 2 | Fannie Lake | A− | 360 | 70.3/hr in electrofishing | 22% | 19" | 1.9 lb | 2022 |
| 3 | Lory Lake | A− | 222 | 69.4/hr in electrofishing | 36% | 20" | 2.3 lb | 2021 |
| 4 | Blue Lake | B+ | 296 | 60.6/hr in electrofishing | 22% | 19" | — | 2025 |
| 5 | Skogman Lake | B | 228 | 51.3/hr in electrofishing | 11% | 19" | — | 2022 |
| 6 | South Stanchfield Lake | B | 411 | 33/hr in electrofishing | 16% | 17" | 0.3 lb | 2024 |
| 7 | Francis Lake | B− | 269 | 33.7/hr in electrofishing | 9% | 19" | 0.1 lb | 2024 |
| 8 | Little Stanchfield Lake | C+ | 146 | 23/hr in electrofishing | 69% | 20" | — | 2024 |
| 9 | Long Lake | C | 387 | 9.5/hr in electrofishing | 73% | 19" | 2.7 lb | 2022 |
| 10 | Florence Lake | C− | 135 | 26.2/hr in electrofishing | 7% | 16" | 1 lb | 2025 |
Also ranked in Isanti County: Walleye · Northern pike · 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.