Birch Lake vs Long Lake
Water quality, depth, fish species, and recreation comparison.
Long Lake has a higher water quality grade (A, Excellent) than Birch Lake (A, Excellent). Both are in Cass County, Minnesota.
A
Birch Lake
Cass County, Minnesota
Good clarity, visible to about 13.7 ft.
A
Long Lake
Cass County, Minnesota
Crystal clear, you can see 21.8 ft down.
Side-by-Side Metrics
| Metric | Birch Lake | Long Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 13.7 ft | 21.8 ft |
| Phosphorus | 12 µg/L | 9 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 45 ft | 115 ft |
| Surface Area | 1.3K acres | 1.0K acres |
| Public Access | Yes | Yes |
| Fish Species | 14 | 14 |
| Trophic State | oligotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Long Lake wins on overall water quality with a Grade A versus Birch Lake's Grade A. Water clarity: 21.8 ft vs 13.7 ft. For fishing diversity, Long Lake also leads with 14 species.