Iron Lake vs Pike Lake
Water quality, depth, fish species, and recreation comparison.
Pike Lake has a higher water quality grade (A, Excellent) than Iron Lake (D, Poor). Both are in St. Louis County, Minnesota.
Both Iron 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. The grades are meaningfully apart: Pike Lake grades a A while Iron Lake grades a D. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.
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?
Iron Lake
Murky, only visible to about 5 ft.
Pike Lake
Crystal clear, you can see 18 ft down.
Side-by-Side Metrics
| Metric | Iron Lake | Pike Lake |
|---|---|---|
| Overall Grade | D (Poor) | A (Excellent) |
| Water Clarity | 5 ft | 18 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 64 ft | 60 ft |
| Surface Area | 2.0K acres | 488.26 acres |
| Public Access | No | Yes |
| Fish Species | 9 | 9 |
| 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 Iron Lake's Grade D. Water clarity: 18 ft vs 5 ft. For fishing diversity, Pike Lake also leads with 9 species.