Calhoun Lake vs Koronis Lake
Water quality, depth, fish species, and recreation comparison.
Calhoun Lake reads lower on nutrients and algae than Koronis Lake. Both are in Minnesota.
Both Calhoun Lake and Koronis 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: Calhoun Lake and Koronis 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.
Calhoun Lake
Moderate clarity, visible to about 6.9 ft.
Koronis Lake
Murky, only visible to about 6 ft.
Side-by-Side Metrics
| Metric | Calhoun Lake | Koronis Lake |
|---|---|---|
| Water Clarity | 6.9 ft Better | 6 ft |
| Phosphorus | 24 µg/L Better | 27 µg/L |
| Chlorophyll-a (Algae) | 8.8 µg/L Better | 13.8 µg/L |
| Maximum Depth | 13 ft | 132 ft Better |
| Surface Area | 647 acres | 2,968 acres |
| Public Access | Yes | Yes |
| Fish Species | 15 | 22 Better |
| Trophic State | eutrophic | eutrophic |
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.
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Verdict
Calhoun Lake and Koronis Lake read the same on nutrients and algae overall. The tiebreakers come down to clarity (Calhoun Lake: 6.9 ft, Koronis Lake: 6 ft) and what you want from the lake. Calhoun Lake has fewer fish species than Koronis Lake.
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Where to stay near Calhoun Lake and Koronis Lake
Compare cabins, hotels, and vacation rentals around Calhoun Lake and Koronis Lake. Both lakes are pinned on the map, so you can see which stays sit nearer the one you pick. Switch to Satellite to see how close each is to the water.
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Source: EPA National Aquatic Resource Surveys, 2026.