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LakeGrade

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.

RankLakeCountyStateClarityGradeMax Depth
1Adams LakeVilasWI328.1 ftA
2Sturgeon Lake 2GoodhueMN134.5 ftC
3Clear Lake 2GoodhueMN131.2 ftC
4North Lake 2GoodhueMN123.5 ftC
5Clear LakeRockWI123 ftA
6Wazee LakeJacksonWI105.8 ftA
7North Lake 1GoodhueMN100.1 ftC
8Sturgeon Lake 1GoodhueMN93.7 ftC
9Black Oak LakeVilasWI88.6 ftA
10Bardon LakeDouglasWI88.6 ftA
11Whitefish LakeDouglasWI86.9 ftA
12Sealion LakeFlorenceWI84 ftA
13Pine LakeWaukeshaWI82 ftA
14Whitefish LakeDouglasWI82 ftA
15Crystal LakeOneidaWI82 ftA
16Maiden LakeOcontoWI80.4 ftA
17Lily LakeMarinetteWI78.7 ftA
18Lake OwenBayfieldWI78.7 ftA
19Big Hurst LakeVilasWI78.7 ftA
20Clara Lake-Deep HoleLincolnWI78.1 ftA
21Stone LakeWashburnWI75.5 ftA
22Millicent LakeBayfieldWI75.5 ftA
23Roach LakeVilasWI75.5 ftA
24Blue LakeOneidaWI73.8 ftA
25Lake MetongaForestWI72.2 ftA
26Forest LakeVilasWI72.2 ftA
27Fountain LakePortageWI72.2 ftA
28Wheeler LakeOcontoWI72.2 ftA
29Lee LakeOneidaWI71.4 ftA
30Buskey Bay LakeBayfieldWI70.9 ftA
31Hart LakeBayfieldWI70.5 ftA
32Long LakeBurnettWI68.9 ftA
33Anderson LakeVilasWI68.9 ftA
34Keyes LakeFlorenceWI68.9 ftA
35Hasbrook LakeOneidaWI68.9 ftA
36Mary LakeLincolnWI68.9 ftA
37Ebert LakePortageWI68.9 ftA
38Carlin LakeVilasWI68.9 ftA
39Sea Lion LakeFlorenceWI68.9 ftA
40Rock River LakeRockWI68.9 ftA
41Lower Pine LakePolkWI68.9 ftA
42Round LakeSawyerWI68.2 ftA
43Boot LakeOcontoWI67.3 ftA
44Lake AnnaFlorenceWI67.3 ftA
45Squaw Smith LakeBeltramiMN65.6 ftA
46Sand LakePolkWI65.6 ftA
47Beasley LakeWaupacaWI65.6 ftA
48Paya LakeOcontoWI65.6 ftA
49White Sand LakeVilasWI65.6 ftA
50Pearl LakeWausharaWI65.6 ftA