Blanche Lake vs Otter Tail Lake
Water quality, depth, fish species, and recreation comparison.
Blanche Lake reads lower on nutrients and algae than Otter Tail Lake. Both are in Otter Tail County, Minnesota.
Blanche Lake and Otter Tail 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. The readings are close: Blanche Lake and Otter Tail Lake sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.
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.
Blanche Lake
Good clarity, visible to about 12.5 ft.
Otter Tail Lake
Good clarity, visible to about 12.1 ft.
Side-by-Side Metrics
| Metric | Blanche Lake | Otter Tail Lake |
|---|---|---|
| Water Clarity | 12.5 ft Better | 12.1 ft |
| Phosphorus | 11 µg/L Better | 16 µg/L |
| Chlorophyll-a (Algae) | 4.5 µg/L Better | 5.5 µg/L |
| Maximum Depth | 64 ft | 120 ft Better |
| Surface Area | 1,296 acres | 14,079 acres |
| Public Access | Yes | Yes |
| Fish Species | 4 | 17 Better |
| 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.
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Verdict
Blanche Lake and Otter Tail Lake read the same on nutrients and algae overall. The tiebreakers come down to clarity (Blanche Lake: 12.5 ft, Otter Tail Lake: 12.1 ft) and what you want from the lake. Blanche Lake has fewer fish species than Otter Tail Lake.
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Where to stay near Blanche Lake and Otter Tail Lake
Compare cabins, hotels, and vacation rentals around Blanche Lake and Otter Tail Lake. Both lakes are pinned on the map, so you can see which stays sit nearer the one you pick. Switch to Satellite to see how close each is to the water.
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Source: EPA National Aquatic Resource Surveys, 2026.