North Twin Lake

On the LakeGrade rubric, North Twin Lake pulls an A: clarity at 17.4 ft and 7 µg/L of phosphorus put it in the top bracket for Minnesota. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI value of 34 puts North Twin Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's 59 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. At 326 acres, North Twin Lake fits the Minnesota median for monitored lakes, with 3.8 miles of shoreline. North Twin Lake ranks 13 of 86 in Beltrami County, putting it in the upper tier of locally monitored lakes.

No invasive species are currently listed at North Twin Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at North Twin 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. Ice-out has been recorded 7 times at North Twin Lake, with a median around Apr 24. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.