Bad Medicine Lake vs Big Cormorant Lake
Water quality, depth, fish species, and recreation comparison.
Bad Medicine Lake and Big Cormorant Lake read the same on nutrients and algae. Both are in Becker County, Minnesota.
Both Bad Medicine Lake and Big Cormorant 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. These two sit close on the readings, Bad Medicine Lake versus Big Cormorant Lake. The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
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.
Bad Medicine Lake
Crystal clear, you can see 25 ft down.
Big Cormorant Lake
Crystal clear, you can see 24.8 ft down.
Side-by-Side Metrics
| Metric | Bad Medicine Lake | Big Cormorant Lake |
|---|---|---|
| Water Clarity | 25 ft Better | 24.8 ft |
| Phosphorus | 6 µg/L Better | 16.5 µg/L |
| Chlorophyll-a (Algae) | 1.6 µg/L Better | 2.2 µg/L |
| Maximum Depth | 84 ft Better | 75 ft |
| Surface Area | 803 acres | 3,657 acres |
| Public Access | Yes | Yes |
| Fish Species | 13 | 16 Better |
| Trophic State | oligotrophic | oligotrophic |
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.
Swap a lake
Compare Bad Medicine Lake or Big Cormorant Lake against a different lake.
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Bad Medicine Lake: 25 ft, Big Cormorant Lake: 24.8 ft) and what you want from the lake. Bad Medicine Lake has fewer fish species than Big Cormorant Lake.
Source: EPA National Aquatic Resource Surveys, 2026.