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Clearwater Lake and Devil Track Lake read the same on nutrients and algae. Both are in Cook County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

Both Clearwater Lake and Devil Track Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. The readings are close: Clearwater Lake and Devil Track Lake sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.

With readings this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

Clearwater Lake

Cook County, Minnesota

Crystal clear, you can see 29 ft down.

Devil Track Lake

Cook County, Minnesota

Moderate clarity, visible to about 7 ft.

Side-by-Side Metrics

MetricClearwater LakeDevil Track Lake
Water Clarity29 ft Better7 ft
Phosphorus4 µg/L Better12 µg/L
Chlorophyll-a (Algae)1.3 µg/L Better5.3 µg/L
Maximum Depth65 ft Better50 ft
Surface Area462 acres1,876 acres
Public AccessNoYes
Fish Species09 Better
Trophic Stateoligotrophicmesotrophic

A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.

Verdict

Both lakes earn the same Grade A. The tiebreakers come down to clarity (Clearwater Lake: 29 ft, Devil Track Lake: 7 ft) and what you want from the lake. Clearwater Lake has fewer fish species than Devil Track Lake.

Source: EPA National Aquatic Resource Surveys, 2026.