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South Turtle Lake reads lower on nutrients and algae than Stalker Lake. Both are in Otter Tail County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

South Turtle Lake and Stalker Lake are both in Minnesota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. These two sit close on the readings, South Turtle Lake versus Stalker 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.

South Turtle Lake

Otter Tail County, Minnesota

Good clarity, visible to about 14.1 ft.

Stalker Lake

Otter Tail County, Minnesota

Murky, only visible to about 6.6 ft.

Side-by-Side Metrics

MetricSouth Turtle LakeStalker Lake
Water Clarity14.1 ft Better6.6 ft
Phosphorus20 µg/L Better22 µg/L
Chlorophyll-a (Algae)3.7 µg/L Better7.1 µg/L
Maximum Depth35 ft95 ft Better
Surface Area837 acres1,357 acres
Public AccessYesYes
Fish Species1317 Better
Trophic Statemesotrophicmesotrophic

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.

Verdict

South Turtle Lake reads lower on nutrients and algae than Stalker Lake. Water clarity: 14.1 ft vs 6.6 ft. For more fish-species variety, Stalker Lake edges ahead with 17 documented species.

Source: EPA National Aquatic Resource Surveys, 2026.