Three Island Lake vs Turtle Lake
Water quality, depth, fish species, and recreation comparison.
Three Island Lake has a higher water quality grade (A, Excellent) than Turtle Lake (B, Good). Both are in Beltrami County, Minnesota.
A
Three Island Lake
Beltrami County, Minnesota
Good clarity, visible to about 12 ft.
B
Turtle Lake
Beltrami County, Minnesota
Moderate clarity, visible to about 9.5 ft.
Side-by-Side Metrics
| Metric | Three Island Lake | Turtle Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 12 ft | 9.5 ft |
| Phosphorus | 17 µg/L | 14 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 25 ft | 45 ft |
| Surface Area | 729.49 acres | 1.6K acres |
| Public Access | Yes | Yes |
| Fish Species | 17 | 16 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Three Island Lake wins on overall water quality with a Grade A versus Turtle Lake's Grade B. Water clarity: 12 ft vs 9.5 ft. For fishing diversity, Three Island Lake also leads with 17 species.