Grace Lake vs Wolf Lake
Water quality, depth, fish species, and recreation comparison.
Wolf Lake reads lower on nutrients and algae than Grace Lake. Both are in Beltrami County, Minnesota.
Both Grace Lake and Wolf Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. Wolf Lake reads materially cleaner than Grace Lake on nutrients and algae. A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.
For a recreational visitor, the wider gap in the readings is decisive: Wolf Lake has the lower nutrient and algae numbers. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?
Grace Lake
Crystal clear, you can see 15 ft down.
Wolf Lake
Moderate clarity, visible to about 9 ft.
Side-by-Side Metrics
| Metric | Grace Lake | Wolf Lake |
|---|---|---|
| Water Clarity | 15 ft Better | 9 ft |
| Phosphorus | 21.5 µg/L | 19 µg/L Better |
| Chlorophyll-a (Algae) | 9.3 µg/L | 5.3 µg/L Better |
| Maximum Depth | 42 ft | 57 ft Better |
| Surface Area | 860 acres | 1,076 acres |
| Public Access | Yes | Yes |
| Fish Species | 13 | 18 Better |
| Trophic State | mesotrophic | mesotrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
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Verdict
Wolf Lake reads lower on nutrients and algae than Grace Lake. Water clarity: 9 ft vs 15 ft. For fishing diversity, Wolf Lake also leads with 18 species.
Source: EPA National Aquatic Resource Surveys, 2026.