Rainy Lake vs Rainy Lake
Water quality, depth, fish species, and recreation comparison.
Rainy Lake and Rainy Lake both received the same overall water quality grade of D (Poor). Both are in Koochiching County, Minnesota.
Both Rainy Lake and Rainy 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. The grades are close: Rainy Lake (D) and Rainy 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.
Rainy Lake
Murky, only visible to about 3.6 ft.
Rainy Lake
Murky, only visible to about 5.2 ft.
Side-by-Side Metrics
| Metric | Rainy Lake | Rainy Lake |
|---|---|---|
| Overall Grade | D (Poor) | D (Poor) |
| Water Clarity | 3.6 ft | 5.2 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 161 ft | 161 ft |
| Surface Area | 210.2K acres | 210.2K acres |
| Public Access | Yes | Yes |
| Fish Species | 1 | 1 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade D. The tiebreakers come down to clarity (Rainy Lake: 3.6 ft, Rainy Lake: 5.2 ft) and what you want from the lake. Rainy Lake matches its peer on species count.