Duncan Lake vs Rose Lake
Water quality, depth, fish species, and recreation comparison.
Duncan Lake has a higher water quality grade (A, Excellent) than Rose Lake (B, Good). Both are in Cook County, Minnesota.
Both Duncan Lake and Rose 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 — Duncan Lake (A) versus Rose Lake (B). 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.
Duncan Lake
Crystal clear, you can see 22 ft down.
Rose Lake
Good clarity, visible to about 14.5 ft.
Side-by-Side Metrics
| Metric | Duncan Lake | Rose Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 22 ft | 14.5 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 130 ft | 130 ft |
| Surface Area | 476.95 acres | 476.95 acres |
| Public Access | No | No |
| Fish Species | 1 | 1 |
| Trophic State | oligotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Duncan Lake wins on overall water quality with a Grade A versus Rose Lake's Grade B. Water clarity: 22 ft vs 14.5 ft. For fishing diversity, Duncan Lake also leads with 1 species.