Gladstone Lake vs North Long Lake
Water quality, depth, fish species, and recreation comparison.
Gladstone Lake and North Long Lake read the same on nutrients and algae. Both are in Crow Wing County, Minnesota.
Both Gladstone Lake and North Long 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: Gladstone Lake and North Long 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.
Gladstone Lake
Good clarity, visible to about 10.5 ft.
North Long Lake
Crystal clear, you can see 15.1 ft down.
Side-by-Side Metrics
| Metric | Gladstone Lake | North Long Lake |
|---|---|---|
| Water Clarity | 10.5 ft | 15.1 ft Better |
| Phosphorus | 17 µg/L | 14 µg/L Better |
| Chlorophyll-a (Algae) | 4.8 µg/L | 2.7 µg/L Better |
| Maximum Depth | 36 ft | 97 ft Better |
| Surface Area | 437 acres | 6,190 acres |
| Public Access | Yes | Yes |
| Fish Species | 15 | 18 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
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Gladstone Lake: 10.5 ft, North Long Lake: 15.1 ft) and what you want from the lake. Gladstone Lake has fewer fish species than North Long Lake.
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Where to stay near Gladstone Lake and North Long Lake
Compare cabins, hotels, and vacation rentals around Gladstone Lake and North Long 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.