Island Lake
Stillwater County, Montana170 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
- 40 ft max depth
Island Lake in Stillwater County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 40 ft. Surface area: 170 acres.
Island Lake is a 170-acre lake in Stillwater County, Montana with a maximum depth of 40 feet.
Source: EPA Water Quality Portal sampling records, Montana DEQ. Methodology: how these readings are compared.
What Island Lake is good for
From access and monitoring records, not editorial picks.
- Deep water40 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 Island 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 Island Lake
These are the measurements Montana DEQ publishes for Island 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 Island Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
40 ft
Surface area
170 acres
Shoreline
3.9 mi
Stays via Stay22
Stays near Island Lake
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Top-rated places to stay near Island Lake
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Fishing Island Lake
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Frequently asked questions about Island Lake
Where is Island Lake?
- Island Lake is a lake in Stillwater County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Island Lake?
- Island Lake in Stillwater County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Maximum depth: 40 ft. Surface area: 170 acres.
Is Island Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Island Lake?
- Island Lake has a maximum depth of 40 feet. The lake covers 170 acres.
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Where this data comes from
Measurements for Island Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.