Dora Lake vs Island Lake
Water quality, depth, fish species, and recreation comparison.
Dora Lake reads lower on nutrients and algae than Island Lake. Both are in Itasca County, Minnesota.
Both Dora Lake and Island 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. The readings are close: Dora Lake and Island 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.
Dora Lake
Moderate clarity, visible to about 7.5 ft.
Island Lake
Moderate clarity, visible to about 8.9 ft.
Side-by-Side Metrics
| Metric | Dora Lake | Island Lake |
|---|---|---|
| Water Clarity | 7.5 ft | 8.9 ft Better |
| Phosphorus | 27 µg/L Better | 32.5 µg/L |
| Chlorophyll-a (Algae) | 8.1 µg/L Better | 9.9 µg/L |
| Maximum Depth | 18 ft | 35 ft Better |
| Surface Area | 423 acres | 3,108 acres |
| Public Access | Yes | Yes |
| Fish Species | 13 | 15 Better |
| Trophic State | eutrophic | eutrophic |
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
Dora Lake and Island Lake read the same on nutrients and algae overall. The tiebreakers come down to clarity (Dora Lake: 7.5 ft, Island Lake: 8.9 ft) and what you want from the lake. Dora Lake has fewer fish species than Island Lake.
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Where to stay near Dora Lake and Island Lake
Compare cabins, hotels, and vacation rentals around Dora Lake and Island 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.