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

Ravalli County Lake Quality

Montana, 21 lakes, measured by Montana DEQ

There are 21 monitored lakes in Ravalli County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The 21 monitored lakes in Ravalli County carry whatever clarity, phosphorus, and chlorophyll-a readings Montana DEQ has published, shown as reported.

Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.

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Where to stay near Ravalli County

Top-rated places to stay near Ravalli County

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Quick Answers for Ravalli County

Cleanest lakes in Ravalli County →Cleanest lakes in Montana →Best swimming lakes in Montana →

Planning a trip? Check special fishing regulations for South Fork Lake — or check the official Montana fishing regulations.

All Lakes in Ravalli County

21 lakes · 0 ranked on readings, 21 without enough sampling0 lakes ranked on readings · 21 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
South Fork LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Creek LakesRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
South Kootenai LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bass LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Burnt Fork LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Fred Burr ReservoirRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mill LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Blodgett LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
High LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Canyon LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower Twin LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Fish LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lost Horse LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Elk LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Grizzly LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Kerlee LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake ComoRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samples93 ftNot recorded
Painted Rocks LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Boulder LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Nelson LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Tin Cup LakeRavalliNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Other Counties in Montana

Missoula County

46 lakes

Carbon County

38 lakes

Yellowstone County

6 lakes

Flathead County

108 lakes

Big Horn County

4 lakes

Lake County

38 lakes

Browse every Montana lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the Montana Department of Environmental Quality. See data sources.