Marion Lake
Flathead County, Montana74 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Marion Lake in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 74 acres.
Marion Lake is a 74-acre lake in Flathead 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 Marion 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 Marion Lake
These are the measurements Montana DEQ publishes for Marion 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 Marion Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
74 acres
Shoreline
1.6 mi
No bathymetric survey has been published for Marion Lake, so its depth is not documented here.
Stays via Stay22
Stays near Marion Lake
Compare lakeside cabins, hotels, and vacation rentals near Marion Lake in Flathead County, Montana — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Frequently asked questions about Marion Lake
Where is Marion Lake?
- Marion Lake is a lake in Flathead County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Marion Lake?
- Marion Lake in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 74 acres.
Is Marion 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 Marion Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.