B
Beltrami County Lake Quality
Minnesota, 92 lakes, average grade B (Good)
Beltrami County has 92 graded lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the grade distribution reflects that mix. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Fullers Lake: East Basin (A); the most-stressed is Dune Lake (F).
Reviewed by LakeQuality Editorial Team · Updated
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Quick Answers for Beltrami County
Cleanest lakes in Beltrami County →Cleanest lakes in Minnesota →Safest swimming lakes in Minnesota →
Planning a trip? Check special fishing regulations for Fullers Lake: East Basin, and the best times to fish — or browse the full Minnesota regulations index.
DNR Reports (131)
Minnesota DNR LakeFinder resources for lakes in Beltrami County. Showing 12 most recent — browse all reports →
- —Fisheries Lake Survey — WolfFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — Red (Upper Red)Fisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — Turtle RiverFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — TurtleFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — Three IslandFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — SwensonFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — StumpFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — South TwinFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — SilverFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — SylviaFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — RabideauFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — PimusheFisheries Lake Survey · MN DNR LakeFinder
All Lakes in Beltrami County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Fullers Lake: East Basin | A | 15 ft | - | 9.5 µg/L |
| 2 | Round Lake | A | 18 ft | 38 ft | 7 µg/L |
| 3 | Long Lake | A | 20 ft | 87 ft | 7 µg/L |
| 4 | Andrusia Lake | A | 15.5 ft | 60 ft | 14 µg/L |
| 5 | Green Lake | A | 18.5 ft | - | 7 µg/L |
| 6 | Island Lake | A | 16 ft | - | 10 µg/L |
| 7 | Sandy Lake | A | 16 ft | - | 8 µg/L |
| 8 | North Twin Lake | A | 17.4 ft | 59 ft | 7 µg/L |
| 9 | Little Bass Lake | A | 16 ft | 22 ft | 10 µg/L |
| 10 | Shemahgun Lake | A | 15 ft | - | 10 µg/L |
| 11 | Kinney Lake | A | 15 ft | - | 8 µg/L |
| 12 | Swenson Lake | A | 20.8 ft | 76 ft | 8 µg/L |
| 13 | Squaw Smith Lake | A | 20 ft | - | 10 µg/L |
| 14 | South Twin Lake | A | 16.4 ft | 45 ft | 8.5 µg/L |
| 15 | Little Thunder Lake | A | 15 ft | - | 12 µg/L |
| 16 | Buzzle Lake | A | 17.1 ft | 83 ft | 8.5 µg/L |
| 17 | Cass Lake Allens Bay | A | 16.6 ft | 120 ft | - |
| 18 | Cass Lake | A | 18.5 ft | 120 ft | - |
| 19 | Grass Island Lake | A | - | - | 9 µg/L |
| 20 | Kesagiagan Lake | A | - | - | 8 µg/L |
| 21 | Laxon Lake | A | - | - | 14 µg/L |
| 22 | Long Lake | A | 10 ft | 83 ft | 17 µg/L |
| 23 | Long Lake | A | 14 ft | - | 8 µg/L |
| 24 | Deer Lake | A | 11 ft | 42 ft | 16 µg/L |
| 25 | Shell Lake | A | 13 ft | - | 11 µg/L |
| 26 | Green Lake | A | 12 ft | - | 10 µg/L |
| 27 | Grace Lake | A | 15.5 ft | 42 ft | 21.5 µg/L |
| 28 | Moose Lake | A | 14.1 ft | 71 ft | 11 µg/L |
| 29 | Heart Lake | A | 14.5 ft | - | 10 µg/L |
| 30 | Bemidji Lake | A | 12.5 ft | 76 ft | 16.5 µg/L |
| 31 | Balm Lake | A | 11 ft | 33 ft | 16.5 µg/L |
| 32 | Stump Lake | A | 12.5 ft | 24 ft | 19.5 µg/L |
| 33 | Three Island Lake | A | 12 ft | 25 ft | 17 µg/L |
| 34 | Beltrami Lake | A | 11 ft | 50 ft | 15 µg/L |
| 35 | Buck Lake | A | 12 ft | 40 ft | - |
| 36 | Fox Lake | A | 11.2 ft | 19 ft | 14 µg/L |
| 37 | Big Bass Lake | A | 10.8 ft | 17 ft | 14 µg/L |
| 38 | Movil Lake | A | 14 ft | 50 ft | 12 µg/L |
| 39 | Grant Lake | A | 10.7 ft | 92 ft | 11.5 µg/L |
| 40 | No-Name Lake | A | 13 ft | - | 11 µg/L |
| 41 | Lindgren Lake | A | 13.5 ft | - | 14 µg/L |
| 42 | Fullers Lake: West Basin | A | 13 ft | - | 12.5 µg/L |
| 43 | Dickens Lake | A | 11 ft | - | 15 µg/L |
| 44 | Chain: Middle Lake | A | 11.3 ft | - | 14 µg/L |
| 45 | Big Thunder Lake | A | 11.5 ft | - | 13 µg/L |
| 46 | Chain: South Lake | A | 11 ft | - | 14 µg/L |
| 47 | Bass Lake: Northwest Basin | A | 11 ft | - | 12 µg/L |
| 48 | Little Big Lake | B | 9.3 ft | 35 ft | 13.5 µg/L |
| 49 | Big Lake | B | 9.7 ft | 35 ft | 15 µg/L |
| 50 | Emerald Lake | B | 9.5 ft | - | 12 µg/L |
| 51 | Turtle Lake | B | 9.5 ft | 45 ft | 14 µg/L |
| 52 | Rush Lake | B | - | - | 20 µg/L |
| 53 | Wolf Lake | B | 9 ft | 57 ft | 19 µg/L |
| 54 | Julia Lake | B | 7.4 ft | 43 ft | 17.5 µg/L |
| 55 | Black Lake | B | 10.5 ft | 42 ft | 22 µg/L |
| 56 | Bass Lake: Southeast Basin | B | 9 ft | - | 12.5 µg/L |
| 57 | Bullhead Lake | B | 7.5 ft | 40 ft | - |
| 58 | Kitchi West Arm Lake | B | 10.2 ft | 50 ft | - |
| 59 | Pug Hole Lake | B | 10.7 ft | - | - |
| 60 | Gwin Lake | B | - | - | 22 µg/L |
| 61 | Fairbanks Lake | B | - | - | 22 µg/L |
| 62 | Jessie Lake | B | 4.6 ft | 35 ft | 23 µg/L |
| 63 | Kitchi Lake | B | 8.2 ft | 50 ft | 19.5 µg/L |
| 64 | Pimushe Lake | B | 8.2 ft | 40 ft | 21 µg/L |
| 65 | Medicine Lake | B | 7.9 ft | 44 ft | 22 µg/L |
| 66 | Little Turtle Lake | B | 7 ft | 25 ft | 23 µg/L |
| 67 | Turtle River Lake | B | 8.7 ft | 63 ft | 20 µg/L |
| 68 | Johnson Lake | B | 7.5 ft | - | 24 µg/L |
| 69 | Marquette Lake | B | 8.5 ft | 51 ft | 24 µg/L |
| 70 | Drewery Lake | B | 3.5 ft | 120 ft | - |
| 71 | Head Lake | B | 5.1 ft | - | 5 µg/L |
| 72 | Little Rice Lake | B | 7.5 ft | 26 ft | - |
| 73 | Schram Lake | C | 3.9 ft | - | 21 µg/L |
| 74 | Gull Lake | C | 5.9 ft | 23 ft | 27 µg/L |
| 75 | Campbell Lake | C | 6.4 ft | 25 ft | 22 µg/L |
| 76 | Rabideau Lake | C | 9 ft | 112 ft | - |
| 77 | Irving Lake | C | 5.3 ft | 19 ft | 30 µg/L |
| 78 | Moose Lake | C | 3.8 ft | 13 ft | 58.5 µg/L |
| 79 | Lower Red Lake : East Central | C | 4 ft | - | 36 µg/L |
| 80 | Lower Red Lake : East | C | 4 ft | - | 32 µg/L |
| 81 | Lower Red Lake : Central | C | 4 ft | - | 36 µg/L |
| 82 | Blackduck Lake | C | 6.2 ft | 28 ft | 39.5 µg/L |
| 83 | Lower Red Lake : West | C | 4 ft | - | 37 µg/L |
| 84 | Lower Red Lake: West Central | C | 4 ft | - | 34 µg/L |
| 85 | Big Rice Lake | C | 5.7 ft | 13 ft | - |
| 86 | Upper Red Lake: West-Central | D | 2 ft | 15 ft | 42 µg/L |
| 87 | Upper Red Lake: East | D | 2 ft | 15 ft | 37 µg/L |
| 88 | Upper Red Lake: West | D | 2 ft | 15 ft | 39 µg/L |
| 89 | Upper Red Lake: East Central | D | 2 ft | 15 ft | 39.5 µg/L |
| 90 | Upper Red Lake: Central | D | 2 ft | 15 ft | 40 µg/L |
| 91 | Gilstad Lake | D | 6.2 ft | 55 ft | - |
| 92 | Dune Lake | F | - | - | 210 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.