Eagle Lake vs Long Lake
Water quality, depth, fish species, and recreation comparison.
Eagle Lake has a higher water quality grade (A, Excellent) than Long Lake (B, Good). Both are in Otter Tail County, Minnesota.
Both Eagle Lake and Long 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 — Eagle Lake (A) versus Long 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.
Eagle Lake
Crystal clear, you can see 22.6 ft down.
Long Lake
Good clarity, visible to about 12.3 ft.
Side-by-Side Metrics
| Metric | Eagle Lake | Long Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 22.6 ft | 12.3 ft |
| Phosphorus | 5 µg/L | 20 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 46 ft | 128 ft |
| Surface Area | 907.4 acres | 1.3K acres |
| Public Access | Yes | Yes |
| Fish Species | 10 | 16 |
| Trophic State | oligotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Eagle Lake wins on overall water quality with a Grade A versus Long Lake's Grade B. Water clarity: 22.6 ft vs 12.3 ft. For more fish-species variety, Long Lake edges ahead with 16 documented species.