Johnson Lake vs Spider Lake
Water quality, depth, fish species, and recreation comparison.
Johnson Lake has a higher water quality grade (A, Excellent) than Spider Lake (B, Good). Both are in Itasca County, Minnesota.
A
Johnson Lake
Itasca County, Minnesota
Crystal clear, you can see 15.7 ft down.
B
Spider Lake
Itasca County, Minnesota
Good clarity, visible to about 10 ft.
Side-by-Side Metrics
| Metric | Johnson Lake | Spider Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 15.7 ft | 10 ft |
| Phosphorus | 9 µg/L | No data |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 88 ft | 36 ft |
| Surface Area | 434.03 acres | 1.4K acres |
| Public Access | Yes | Yes |
| Fish Species | 11 | 14 |
| Trophic State | oligotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Johnson Lake wins on overall water quality with a Grade A versus Spider Lake's Grade B. Water clarity: 15.7 ft vs 10 ft. For more fish-species variety, Spider Lake edges ahead with 14 documented species.