Shamineau Lake vs Sullivan Lake
Water quality, depth, fish species, and recreation comparison.
Shamineau Lake and Sullivan Lake read the same on nutrients and algae. Both are in Morrison County, Minnesota.
Both Shamineau Lake and Sullivan Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. These two sit close on the readings, Shamineau Lake versus Sullivan Lake. The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
With readings this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.
Shamineau Lake
Good clarity, visible to about 12.5 ft.
Sullivan Lake
Good clarity, visible to about 10.8 ft.
Side-by-Side Metrics
| Metric | Shamineau Lake | Sullivan Lake |
|---|---|---|
| Water Clarity | 12.5 ft Better | 10.8 ft |
| Phosphorus | 14 µg/L | 14 µg/L |
| Chlorophyll-a (Algae) | 4 µg/L Better | 5 µg/L |
| Maximum Depth | 52 ft | 57 ft Better |
| Surface Area | 1,434 acres | 1,103 acres |
| Public Access | Yes | Yes |
| Fish Species | 18 | 18 |
| Trophic State | mesotrophic | mesotrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
Swap a lake
Compare Shamineau Lake or Sullivan Lake against a different lake.
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Shamineau Lake: 12.5 ft, Sullivan Lake: 10.8 ft) and what you want from the lake. Shamineau Lake matches its peer on species count.
Source: EPA National Aquatic Resource Surveys, 2026.