Big Grizzly Lake
Ravalli County, Montana37 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Big Grizzly Lake in Ravalli County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 37 acres.
Big Grizzly Lake is a 37-acre lake in Ravalli County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Big Grizzly Lake is safe to swim in today is a call for the Montana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Big Grizzly Lake
These are the measurements Montana DEQ publishes for Big Grizzly Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
37 acres
Shoreline
1 mi
No bathymetric survey has been published for Big Grizzly Lake, so its depth is not documented here.
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Nearby Lakes in Ravalli County
Frequently asked questions about Big Grizzly Lake
Where is Big Grizzly Lake?
- Big Grizzly Lake is a lake in Ravalli County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Big Grizzly Lake?
- Big Grizzly Lake in Ravalli County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 37 acres.
Is Big Grizzly Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Big Grizzly Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.