Lost Coon Lake is a mesotrophic lake in Flathead County, Montana. Water quality is graded B based on 1 sampling years through 2023. Compared to the 79 other monitored lakes in Flathead County, Lost Coon Lake ranks #75 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2023-10-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 11.8 ft. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.8 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lost Coon Lake
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Location
County Ranking
Ranked #75 of 80 lakes in Flathead County
Cleaner Lakes Within 30 Miles
Lost Coon Lake holds Grade B. 5 nearby lakes hold higher grades.
- ALost Coon LakeFlathead County · 0.1 mi · Higher grade (B → A)
- ALost Loon LakeFlathead County · 0.1 mi · Higher grade (B → A)
- ABlanchard LakeFlathead County · 0.9 mi · Higher grade (B → A)
- AWhitefish LakeFlathead County · 1.7 mi · Higher grade (B → A)
- ASkyles LakeFlathead County · 2.1 mi · Higher grade (B → A)
Nearby Lakes in Flathead County
Explore Lost Coon Lake across LakeGrade
More Montana Lake Rankings
Other Grade B Lakes in Montana
Mesotrophic Lakes in Montana
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-10-07
Monitoring stations: 1