Blue Lake vs Roosevelt Lake
Water quality, depth, fish species, and recreation comparison.
Blue Lake has a higher water quality grade (A, Excellent) than Roosevelt Lake (A, Excellent). Both are in Minnesota.
Blue Lake and Roosevelt 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: Blue Lake (A) and Roosevelt Lake (A) 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.
Blue Lake
Crystal clear, you can see 19 ft down.
Roosevelt Lake
Good clarity, visible to about 11 ft.
Side-by-Side Metrics
| Metric | Blue Lake | Roosevelt Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 19 ft | 11 ft |
| Phosphorus | No data | 12 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | - |
| Surface Area | 1.5K acres | 1.5K acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 1 |
| Trophic State | oligotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Blue Lake wins on overall water quality with a Grade A versus Roosevelt Lake's Grade A. Water clarity: 19 ft vs 11 ft. For more fish-species variety, Roosevelt Lake edges ahead with 1 documented species.