Deepest Lakes in Minnesota & Wisconsin
The 50 deepest lakes ranked by maximum depth in feet. Deeper lakes tend to have better water quality because thermal stratification helps keep nutrients from mixing throughout the water column.
| Rank | Lake | County | State | Max Depth | Area | Grade | Clarity |
|---|---|---|---|---|---|---|---|
| 1 | Gilbert Pit Lake | St. Louis | MN | 443 ft | 243.41 acres | B | 11.5 ft |
| 2 | St James Pit Lake | St. Louis | MN | 381 ft | 124.18 acres | A | 47.6 ft |
| 3 | Iron Chief Complex Lake | St. Louis | MN | 262.1 ft | 207.44 acres | A | 24.5 ft |
| 4 | Lasalle Lake | Hubbard | MN | 213 ft | 237.9 acres | B | 6.9 ft |
| 5 | Watap Lake | Cook | MN | 210 ft | 2.0K acres | C | 9 ft |
| 6 | Gabimichigami Lake | Cook | MN | 209 ft | 1.2K acres | B | 14 ft |
| 7 | Ten Mile Lake | Cass | MN | 208 ft | 5.1K acres | A | 20 ft |
| 8 | Loon Lake | Cook | MN | 202 ft | 1.1K acres | A | 18 ft |
| 9 | Gunflint Lake | Cook | MN | 200 ft | 4.0K acres | A | 20 ft |
| 10 | Little Gunflint Lake | Cook | MN | 200 ft | 4.0K acres | A | 16.2 ft |
| 11 | Strup Lake | Lake | MN | 195 ft | 1.7K acres | C | 9.7 ft |
| 12 | Sand Point Lake | St. Louis | MN | 184 ft | 8.5K acres | C | 7.5 ft |
| 13 | Sand Point Lake | St. Louis | MN | 184 ft | 8.5K acres | D | 6.6 ft |
| 14 | Sand Point Lake | St. Louis | MN | 184 ft | 8.5K acres | D | 5.9 ft |
| 15 | Larson Lake | Itasca | MN | 177 ft | 208.18 acres | A | 21 ft |
| 16 | Lac la Croix Lake | St. Louis | MN | 168 ft | 29.6K acres | C | 8.6 ft |
| 17 | Crooked Lake | Lake | MN | 165 ft | 10.4K acres | C | 9 ft |
| 18 | Carlos Lake | Douglas | MN | 163 ft | 2.6K acres | A | 17.2 ft |
| 19 | Alvin Lake | Douglas | MN | 163 ft | 2.6K acres | B | 10.5 ft |
| 20 | Rainy Lake | Koochiching | MN | 161 ft | 210.2K acres | D | 3.6 ft |
| 21 | Rainy Lake | St. Louis | MN | 161 ft | 210.2K acres | D | 5.9 ft |
| 22 | Rainy Lake | St. Louis | MN | 161 ft | 210.2K acres | C | 9.5 ft |
| 23 | Rainy Lake | St. Louis | MN | 161 ft | 210.2K acres | C | 7.2 ft |
| 24 | Rainy Lake | Koochiching | MN | 161 ft | 210.2K acres | D | 6.6 ft |
| 25 | Rainy Lake | Koochiching | MN | 161 ft | 210.2K acres | D | 4.9 ft |
| 26 | Rainy Lake | Koochiching | MN | 161 ft | 210.2K acres | D | 3.6 ft |
| 27 | Rainy Lake | Koochiching | MN | 161 ft | 210.2K acres | D | 5.2 ft |
| 28 | Rainy Lake | Koochiching | MN | 161 ft | 210.2K acres | C | 7.5 ft |
| 29 | Trout Lake | Itasca | MN | 157 ft | 1.7K acres | A | 18 ft |
| 30 | Caribou Lake | Itasca | MN | 152 ft | 246.5 acres | A | 31 ft |
| 31 | Namakan Lake | St. Louis | MN | 150 ft | 24.1K acres | C | 8.2 ft |
| 32 | Namakan Lake | St. Louis | MN | 150 ft | 24.1K acres | C | 9.8 ft |
| 33 | Namakan Lake | St. Louis | MN | 150 ft | 24.1K acres | D | 4.1 ft |
| 34 | Little Saganaga Lake | Cook | MN | 150 ft | 1.6K acres | C | 9.3 ft |
| 35 | Namakan Lake | St. Louis | MN | 150 ft | 24.1K acres | B | 11.5 ft |
| 36 | Snowbank Lake | Lake | MN | 150 ft | 4.7K acres | B | 11 ft |
| 37 | Steamboat Bay Lake | Cass | MN | 150 ft | 103.4K acres | B | 9.8 ft |
| 38 | Kabekona Bay Lake | Cass | MN | 150 ft | 103.4K acres | A | 17.2 ft |
| 39 | 16-0524-00 Lake | Cook | MN | 142 ft | 837.01 acres | A | 15 ft |
| 40 | Six Lake | Otter Tail | MN | 140 ft | 196.53 acres | A | 20.2 ft |
| 41 | Elmo Lake | Washington | MN | 140 ft | 256.82 acres | B | 11.2 ft |
| 42 | South Lake | Cook | MN | 140 ft | 1.1K acres | C | 8 ft |
| 43 | Whitefish Lake | Crow Wing | MN | 138 ft | 7.7K acres | A | 15.1 ft |
| 44 | Rose Lake | Otter Tail | MN | 137 ft | 1.2K acres | A | 15 ft |
| 45 | Long Lake | Hubbard | MN | 135 ft | 1.9K acres | A | 11.2 ft |
| 46 | Trout Lake | Itasca | MN | 135 ft | 1.9K acres | A | 15.5 ft |
| 47 | Big Sand Lake | Hubbard | MN | 135 ft | 1.6K acres | A | 23 ft |
| 48 | Kabekona Lake | Hubbard | MN | 133 ft | 2.4K acres | A | 11.8 ft |
| 49 | Koronis Lake | Stearns | MN | 132 ft | 3.0K acres | C | 6 ft |
| 50 | Rose Lake | Cook | MN | 130 ft | 476.95 acres | B | 14.5 ft |