Clearest Lakes in Minnesota & Wisconsin
The 50 lakes with the deepest Secchi depth visibility — how far you can see down into the water. Measured in feet using a black-and-white Secchi disk lowered from the surface.
| Rank | Lake | County | State | Clarity | Grade | Max Depth |
|---|---|---|---|---|---|---|
| 1 | Adams Lake | Vilas | WI | 328.1 ft | A | — |
| 2 | Sturgeon Lake 2 | Goodhue | MN | 134.5 ft | C | — |
| 3 | Clear Lake 2 | Goodhue | MN | 131.2 ft | C | — |
| 4 | North Lake 2 | Goodhue | MN | 123.5 ft | C | — |
| 5 | Clear Lake | Rock | WI | 123 ft | A | — |
| 6 | Wazee Lake | Jackson | WI | 105.8 ft | A | — |
| 7 | North Lake 1 | Goodhue | MN | 100.1 ft | C | — |
| 8 | Sturgeon Lake 1 | Goodhue | MN | 93.7 ft | C | — |
| 9 | Black Oak Lake | Vilas | WI | 88.6 ft | A | — |
| 10 | Bardon Lake | Douglas | WI | 88.6 ft | A | — |
| 11 | Whitefish Lake | Douglas | WI | 86.9 ft | A | — |
| 12 | Sealion Lake | Florence | WI | 84 ft | A | — |
| 13 | Pine Lake | Waukesha | WI | 82 ft | A | — |
| 14 | Whitefish Lake | Douglas | WI | 82 ft | A | — |
| 15 | Crystal Lake | Oneida | WI | 82 ft | A | — |
| 16 | Maiden Lake | Oconto | WI | 80.4 ft | A | — |
| 17 | Lily Lake | Marinette | WI | 78.7 ft | A | — |
| 18 | Lake Owen | Bayfield | WI | 78.7 ft | A | — |
| 19 | Big Hurst Lake | Vilas | WI | 78.7 ft | A | — |
| 20 | Clara Lake-Deep Hole | Lincoln | WI | 78.1 ft | A | — |
| 21 | Stone Lake | Washburn | WI | 75.5 ft | A | — |
| 22 | Millicent Lake | Bayfield | WI | 75.5 ft | A | — |
| 23 | Roach Lake | Vilas | WI | 75.5 ft | A | — |
| 24 | Blue Lake | Oneida | WI | 73.8 ft | A | — |
| 25 | Lake Metonga | Forest | WI | 72.2 ft | A | — |
| 26 | Forest Lake | Vilas | WI | 72.2 ft | A | — |
| 27 | Fountain Lake | Portage | WI | 72.2 ft | A | — |
| 28 | Wheeler Lake | Oconto | WI | 72.2 ft | A | — |
| 29 | Lee Lake | Oneida | WI | 71.4 ft | A | — |
| 30 | Buskey Bay Lake | Bayfield | WI | 70.9 ft | A | — |
| 31 | Hart Lake | Bayfield | WI | 70.5 ft | A | — |
| 32 | Long Lake | Burnett | WI | 68.9 ft | A | — |
| 33 | Anderson Lake | Vilas | WI | 68.9 ft | A | — |
| 34 | Keyes Lake | Florence | WI | 68.9 ft | A | — |
| 35 | Hasbrook Lake | Oneida | WI | 68.9 ft | A | — |
| 36 | Mary Lake | Lincoln | WI | 68.9 ft | A | — |
| 37 | Ebert Lake | Portage | WI | 68.9 ft | A | — |
| 38 | Carlin Lake | Vilas | WI | 68.9 ft | A | — |
| 39 | Sea Lion Lake | Florence | WI | 68.9 ft | A | — |
| 40 | Rock River Lake | Rock | WI | 68.9 ft | A | — |
| 41 | Lower Pine Lake | Polk | WI | 68.9 ft | A | — |
| 42 | Round Lake | Sawyer | WI | 68.2 ft | A | — |
| 43 | Boot Lake | Oconto | WI | 67.3 ft | A | — |
| 44 | Lake Anna | Florence | WI | 67.3 ft | A | — |
| 45 | Squaw Smith Lake | Beltrami | MN | 65.6 ft | A | — |
| 46 | Sand Lake | Polk | WI | 65.6 ft | A | — |
| 47 | Beasley Lake | Waupaca | WI | 65.6 ft | A | — |
| 48 | Paya Lake | Oconto | WI | 65.6 ft | A | — |
| 49 | White Sand Lake | Vilas | WI | 65.6 ft | A | — |
| 50 | Pearl Lake | Waushara | WI | 65.6 ft | A | — |