What is the water quality grade for Little Bitterroot Lake?

Little Bitterroot Lake in Flathead County, Montana received a water quality grade of A (Excellent). Water clarity: 40.3 ft visibility.

Is Little Bitterroot Lake safe to swim in?

Excellent for swimming, crystal clear water with minimal algae. Little Bitterroot Lake has an overall water quality grade of A. Always check local health department advisories before swimming.

Flathead County, Montana · 48.11°N

Little Bitterroot Lake

Grade AExcellent · 40.3 ft clarity

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Limited DataOligotrophic

Little Bitterroot Lake is a cold, clear oligotrophic lake in Flathead County, Montana. Water quality is graded A based on 1 sampling years through 2023. Compared to the 79 other monitored lakes in Flathead County, Little Bitterroot Lake ranks #11 for water quality.

Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2023-10-10. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 40.3 ft down. Trophic State Index: 24.

Metric	Value	Grade
Water Clarity (Secchi Depth)	40.3 ft	A
Phosphorus	No data
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	24	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Little Bitterroot Lake

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