Loon Lake

Loon Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season.

Trophically, Loon Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. At 69 ft of maximum depth, Loon Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. At 231 acres, Loon Lake fits the Minnesota median for monitored lakes, with 3.6 miles of shoreline. Loon Lake sits at rank 75 of 141 in Itasca County, in the lower half of the local distribution.

No invasive species are currently listed at Loon Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Loon Lake, one of 12 fish species on record for the lake. Public access is available — the lake is on the Minnesota PCA public-access list. The lake has a partial ice record — 16 observed ice-outs, centered near Apr 18. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.