Lake Blaine
Flathead County, MontanaView mapDirections
Montana DEQ publishes the water-quality measurements for Lake Blaine. Here is what has been measured.
- Limited data
Lake Blaine in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 17.1 ft visibility.
Lake Blaine is a lake in Flathead County, Montana. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Montana DEQ, last sampled 2023-08-03. Methodology: how these readings are compared.
If you are planning to stay, you can search lake houses and cabins around Lake Blaine on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Lake Blaine is good for
From access and monitoring records, not editorial picks.
- Clear water17.1 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Blaine 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 Lake Blaine
These are the measurements Montana DEQ publishes for Lake Blaine, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 17.1 ft down. TSI 36.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 17.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 36 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake Blaine
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Lake Blaine
Compare lakeside cabins, hotels, and vacation rentals near Lake Blaine 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.
Top-rated places to stay near Lake Blaine
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Follow Lake Blaine’s readings
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Fishing Lake Blaine
Water Quality Trend: Worsening
Based on 12 years of monitoring (2012–2023).
Water clarity
Stable5 years
Phosphorus
Stable+0.04 µg/L/yr12 years
Chlorophyll-a
Worsening+0.25 µg/L/yr12 years
Nearby Lakes in Flathead County
Frequently asked questions about Lake Blaine
Where is Lake Blaine?
- Lake Blaine 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 Lake Blaine?
- Lake Blaine in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 17.1 ft visibility.
Is Lake Blaine safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Lake Blaine across LakeQuality
Planning a trip around Glacier?
Lake Blaine is about 34 miles from Glacier National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Glacier →More lakes in Montana
Other Lakes in Montana
Oligotrophic Lakes in Montana
Where this data comes from
3 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS3 samples · 2020–2023
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.