Insula Lake vs Isabella Lake
Water quality, depth, fish species, and recreation comparison.
Insula Lake has a higher water quality grade (C, Fair) than Isabella Lake (D, Poor). Both are in Lake County, Minnesota.
Insula Lake and Isabella Lake are both in Minnesota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are close: Insula Lake (C) and Isabella Lake (D) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.
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.
Insula Lake
Moderate clarity, visible to about 9.5 ft.
Isabella Lake
Murky, only visible to about 5.8 ft.
Side-by-Side Metrics
| Metric | Insula Lake | Isabella Lake |
|---|---|---|
| Overall Grade | C (Fair) | D (Poor) |
| Water Clarity | 9.5 ft | 5.8 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 63 ft | 19 ft |
| Surface Area | 2.8K acres | 1.3K acres |
| Public Access | No | Yes |
| Fish Species | 0 | 1 |
| Trophic State | mesotrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Insula Lake wins on overall water quality with a Grade C versus Isabella Lake's Grade D. Water clarity: 9.5 ft vs 5.8 ft. For more fish-species variety, Isabella Lake edges ahead with 1 documented species.