Cass Lake Allens Bay vs Wolf Lake
Water quality, depth, fish species, and recreation comparison.
Cass Lake Allens Bay and Wolf Lake both received the same overall water quality grade of A (Excellent). Both are in Beltrami County, Minnesota.
Cass Lake Allens Bay and Wolf 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: Cass Lake Allens Bay (A) and Wolf 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.
Cass Lake Allens Bay
Crystal clear, you can see 16.6 ft down.
Wolf Lake
Moderate clarity, visible to about 9 ft.
Side-by-Side Metrics
| Metric | Cass Lake Allens Bay | Wolf Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 16.6 ft | 9 ft |
| Phosphorus | 18.5 µg/L | 19 µg/L |
| Chlorophyll-a (Algae) | 4.7 µg/L | 5.3 µg/L |
| Maximum Depth | 120 ft | 57 ft |
| Surface Area | 15,958 acres | 1,076 acres |
| Public Access | Yes | Yes |
| Fish Species | 21 | 18 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Cass Lake Allens Bay: 16.6 ft, Wolf Lake: 9 ft) and what you want from the lake. Cass Lake Allens Bay supports more documented fish species.
Source: EPA National Aquatic Resource Surveys, 2026.