Minnesota · ranked from DNR surveys
Best largemouth bass lakes in Isanti County
15 surveyed largemouth bass lakes sit in Isanti County; 11 cleared this site's grade rubric, which reads DNR survey catch rates, size structure and trophy history the same way the live map does for every lake. The top 10 are ranked here.
Green Lake leads at grade A, with 104.9 largemouth bass per hour of electrofishing in its 2025 survey and a 19-inch fish the biggest measured. Fannie Lake is next at A−, 70.3 largemouth bass per hour of electrofishing in its 2022 survey, 22% of the largemouth bass netted over 15 inches. Lory Lake rounds out the top three at A−, a 20-inch fish the biggest measured.
| # | 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 this site's rubric over Minnesota DNR survey data (catch per unit effort against DNR benchmarks, size structure, trophy history). See any lake's page for the underlying numbers. Survey years vary by lake; the table shows each lake's latest.