Pelican Lake vs South Turtle Lake
Water quality, depth, fish species, and recreation comparison.
Pelican Lake and South Turtle Lake both received the same overall water quality grade of A (Excellent). Both are in Otter Tail County, Minnesota.
Pelican Lake and South Turtle 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 are within a letter of each other on the rubric — Pelican Lake (A) versus South Turtle Lake (A). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
With grades 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.
Pelican Lake
Crystal clear, you can see 16.4 ft down.
South Turtle Lake
Good clarity, visible to about 14.1 ft.
Side-by-Side Metrics
| Metric | Pelican Lake | South Turtle Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 16.4 ft | 14.1 ft |
| Phosphorus | 15 µg/L | 20 µg/L |
| Chlorophyll-a (Algae) | 3 µg/L | 3.7 µg/L |
| Maximum Depth | 55 ft | 35 ft |
| Surface Area | 3,962 acres | 837 acres |
| Public Access | Yes | Yes |
| Fish Species | 20 | 13 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Pelican Lake: 16.4 ft, South Turtle Lake: 14.1 ft) and what you want from the lake. Pelican Lake supports more documented fish species.
Source: EPA National Aquatic Resource Surveys, 2026.