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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Cleanest Lakes in Flathead County, Montana

Tally Lake in Flathead County leads the rankings with a water quality grade of A and 15.2 ft of clarity. Below are the top 50 cleanest monitored lakes in Flathead County, Montana, ranked by EPA water quality score.

Ranked List

#LakeCountyGradeClarityPhosphorusAlgae
1Tally LakeFlatheadA15.2 ft4.7 µg/L0.8 µg/L
2Whitefish LakeFlatheadA22 ft2.8 µg/L0.9 µg/L
3Little Bitterroot Lake CenterFlatheadA-4 µg/L1 µg/L
4Mcgilvray LakeFlatheadC-5.9 µg/L1.7 µg/L
5Hanson-Doyle LakeFlatheadC-7.3 µg/L2.3 µg/L
6Bailey LakeFlatheadC-6.9 µg/L2 µg/L
7Foys LakeFlatheadD-15.8 µg/L4.1 µg/L
8Rogers LakeFlatheadD-11.6 µg/L2.6 µg/L
9Hubbart ReservoirFlatheadNR---
10Little McGregor LakeFlatheadNR---
11McGregor LakeFlatheadNR---
12Lynch LakeFlatheadNR---
13Dahl LakeFlatheadNR---
14Pearson ReservoirFlatheadNR---
15Smith LakeFlatheadNR---
16Lake MonroeFlatheadNR---
17Lone LakeFlatheadNR---
18Middle Foy LakeFlatheadNR---
19McWenneger SloughFlatheadNR---
20Egan SloughFlatheadNR---
21Church SloughFlatheadNR---
22Wileys SloughFlatheadNR---
23Fennon SloughFlatheadNR---
24Lake of the WoodsFlatheadNR---
25Mud LakeFlatheadNR---
26Margaret LakeFlatheadNR---
27Handkerchief LakeFlatheadNR---
28Pilgrim LakesFlatheadNR---
29Birch LakeFlatheadNR---
30Black LakeFlatheadNR---
31Wildcat LakeFlatheadNR---
32Clayton LakeFlatheadNR---
33Hungry Horse ReservoirFlatheadNR---
34Lion LakeFlatheadNR---
35Lore LakeFlatheadNR---
36Bowser LakeFlatheadNR---
37Boyle LakeFlatheadNR---
38Spoon LakeFlatheadNR---
39Harrison LakeFlatheadNR---
40Lincoln LakeFlatheadNR---
41Lake Ellen WilsonFlatheadNR---
42Avalanche LakeFlatheadNR---
43Logging LakeFlatheadNR---
44Trout LakeFlatheadNR---
45Arrow LakeFlatheadNR---
46Lake EvangelineFlatheadNR---
47Ruger LakeFlatheadNR---
48Cerulean LakeFlatheadNR---
49Gyrfalcon LakeFlatheadNR---
50Grace LakeFlatheadNR---

More Answers for Flathead County, Montana

All lakes in Flathead County →Cleanest lakes in Montana →

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