Blackwater Lake vs Mule Lake
Water quality, depth, fish species, and recreation comparison.
Mule Lake has a higher water quality grade (A, Excellent) than Blackwater Lake (B, Good). Both are in Cass County, Minnesota.
B
Blackwater Lake
Cass County, Minnesota
Good clarity, visible to about 13.1 ft.
A
Mule Lake
Cass County, Minnesota
Crystal clear, you can see 18.7 ft down.
Side-by-Side Metrics
| Metric | Blackwater Lake | Mule Lake |
|---|---|---|
| Overall Grade | B (Good) | A (Excellent) |
| Water Clarity | 13.1 ft | 18.7 ft |
| Phosphorus | No data | 9 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 67 ft | 47 ft |
| Surface Area | 771.45 acres | 524.58 acres |
| Public Access | Yes | Yes |
| Fish Species | 16 | 11 |
| Trophic State | mesotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Mule Lake wins on overall water quality with a Grade A versus Blackwater Lake's Grade B. Water clarity: 18.7 ft vs 13.1 ft. For more fish-species variety, Blackwater Lake edges ahead with 16 documented species.