Birch Lake vs Pike Lake
Water quality, depth, fish species, and recreation comparison.
Pike Lake has a higher water quality grade (A, Excellent) than Birch Lake (C, Fair). Both are in St. Louis County, Minnesota.
Both Birch Lake and Pike 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. Pike Lake (A) is materially cleaner than Birch Lake (C). 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 grade gap is decisive — Pike Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?
Birch Lake
Murky, only visible to about 3.9 ft.
Pike Lake
Crystal clear, you can see 18 ft down.
Side-by-Side Metrics
| Metric | Birch Lake | Pike Lake |
|---|---|---|
| Overall Grade | C (Fair) | A (Excellent) |
| Water Clarity | 3.9 ft | 18 ft |
| Phosphorus | 21 µg/L | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 25 ft | 60 ft |
| Surface Area | 7.1K acres | 488.26 acres |
| Public Access | Yes | Yes |
| Fish Species | 1 | 1 |
| Trophic State | eutrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Pike Lake wins on overall water quality with a Grade A versus Birch Lake's Grade C. Water clarity: 18 ft vs 3.9 ft. For fishing diversity, Pike Lake also leads with 1 species.