Portage Lake vs Six Mile Lake
Water quality, depth, fish species, and recreation comparison.
Six Mile Lake has a higher water quality grade (B, Good) than Portage Lake (B, Good). Both are in Cass County, Minnesota.
B
Portage Lake
Cass County, Minnesota
Moderate clarity, visible to about 7.5 ft.
B
Six Mile Lake
Cass County, Minnesota
Good clarity, visible to about 11.5 ft.
Side-by-Side Metrics
| Metric | Portage Lake | Six Mile Lake |
|---|---|---|
| Overall Grade | B (Good) | B (Good) |
| Water Clarity | 7.5 ft | 11.5 ft |
| Phosphorus | 23 µg/L | 16 µg/L |
| Chlorophyll-a (Algae) | 6.1 µg/L | 6.7 µg/L |
| Maximum Depth | 55 ft | 68 ft |
| Surface Area | 1.5K acres | 1.3K acres |
| Public Access | Yes | Yes |
| Fish Species | 15 | 16 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Six Mile Lake wins on overall water quality with a Grade B versus Portage Lake's Grade B. Water clarity: 11.5 ft vs 7.5 ft. For fishing diversity, Six Mile Lake also leads with 16 species.