Beseau Lake

Beseau Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. The lake bottoms out at 27 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake's 225 acres and 5.1 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Beseau Lake ranks 72 of 93 in Becker County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Beseau Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Beseau Lake, one of 14 fish species on record for the lake. A documented public access point at Beseau Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.