Bad Medicine Lake vs Mud Lake
Water quality, depth, fish species, and recreation comparison.
Bad Medicine Lake and Mud Lake both received the same overall water quality grade of A (Excellent). Both are in Becker County, Minnesota.
Both Bad Medicine Lake and Mud Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. These two are within a letter of each other on the rubric — Bad Medicine Lake (A) versus Mud Lake (A). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
With grades 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.
Mud Lake
Good clarity, visible to about 12.5 ft.
Side-by-Side Metrics
| Metric | Bad Medicine Lake | Mud Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 25 ft | 12.5 ft |
| Phosphorus | 6 µg/L | 22 µg/L |
| Chlorophyll-a (Algae) | 1.6 µg/L | 5.9 µg/L |
| Maximum Depth | 84 ft | 34 ft |
| Surface Area | 803 acres | 1,178 acres |
| Public Access | Yes | Yes |
| Fish Species | 13 | 16 |
| Trophic State | oligotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Bad Medicine Lake: 25 ft, Mud Lake: 12.5 ft) and what you want from the lake. Bad Medicine Lake has fewer fish species than Mud Lake.
Source: EPA National Aquatic Resource Surveys, 2026.