Bootjack Lake
Flathead County, MontanaView mapDirections
Montana DEQ publishes the water-quality measurements for Bootjack Lake. Here is what has been measured.
- Limited data
Bootjack Lake in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 20.8 ft visibility.
Bootjack Lake 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 2023-08-07. Methodology: how these readings are compared.
What Bootjack Lake is good for
From access and monitoring records, not editorial picks.
- Clear water20.8 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Bootjack 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 Bootjack Lake
These are the measurements Montana DEQ publishes for Bootjack Lake, 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 20.8 ft down. TSI 33.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 20.8ft | 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. | 33 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Bootjack Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Bootjack Lake
Compare lakeside cabins, hotels, and vacation rentals near Bootjack 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.
Top-rated places to stay near Bootjack Lake
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Fishing Bootjack Lake
Water Quality Trend: Worsening
Based on 10 years of monitoring (2012–2023).
Water clarity
Worsening3 years
Phosphorus
Worsening+1.03 µg/L/yr9 years
Chlorophyll-a
Stable+0.01 µg/L/yr10 years
Nearby Lakes in Flathead County
Frequently asked questions about Bootjack Lake
Where is Bootjack Lake?
- Bootjack 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 Bootjack Lake?
- Bootjack Lake in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Water clarity: 20.8 ft visibility.
Is Bootjack Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Bootjack Lake across LakeQuality
Planning a trip around Glacier?
Bootjack Lake is about 36 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
4 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
NALMS4 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.