Cairn Lake
Carbon County, Montana116 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
- 125 ft max depth
Cairn Lake in Carbon County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 125 ft. Surface area: 116 acres.
Cairn Lake is a 116-acre lake in Carbon County, Montana with a maximum depth of 125 feet (54-foot average).
Source: EPA Water Quality Portal sampling records, Montana DEQ. Methodology: how these readings are compared.
What Cairn Lake is good for
From access and monitoring records, not editorial picks.
- Deep water125 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cairn 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 Cairn Lake
These are the measurements Montana DEQ publishes for Cairn 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.
Ask about Cairn Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
125 ft
Average depth
54 ft
Surface area
116 acres
Shoreline
3.7 mi
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Fishing Cairn Lake
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Frequently asked questions about Cairn Lake
Where is Cairn Lake?
- Cairn Lake is a lake in Carbon County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Cairn Lake?
- Cairn Lake in Carbon County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 125 ft. Surface area: 116 acres.
Is Cairn Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Cairn Lake?
- Cairn Lake has a maximum depth of 125 feet and an average depth of 54 feet. The lake covers 116 acres.
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Where this data comes from
Measurements for Cairn Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.