Lower Hay Lake vs Upper Hay Lake
Water quality, depth, fish species, and recreation comparison.
Lower Hay Lake has a higher water quality grade (A, Excellent) than Upper Hay Lake (B, Good). Both are in Crow Wing County, Minnesota.
Both Lower Hay Lake and Upper Hay 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: Lower Hay Lake (A) and Upper Hay Lake (B) 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.
Lower Hay Lake
Crystal clear, you can see 19 ft down.
Upper Hay Lake
Good clarity, visible to about 10 ft.
Side-by-Side Metrics
| Metric | Lower Hay Lake | Upper Hay Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 19 ft | 10 ft |
| Phosphorus | 13 µg/L | 20 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 100 ft | 42 ft |
| Surface Area | 700.21 acres | 595.7 acres |
| Public Access | Yes | Yes |
| Fish Species | 1 | 1 |
| Trophic State | oligotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Lower Hay Lake wins on overall water quality with a Grade A versus Upper Hay Lake's Grade B. Water clarity: 19 ft vs 10 ft. For fishing diversity, Lower Hay Lake also leads with 1 species.