Man Lake

Man Lake sits at the top of the Minnesota PCA grading rubric with an A, a mark reached by the cleanest lakes in Minnesota. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Trophically, Man Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. Man Lake is unusually deep for Minnesota at 93 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 491 acres, Man Lake fits the Minnesota median for monitored lakes, with 4.5 miles of shoreline. Man Lake sits at rank 69 of 133 in Cass County, in the lower half of the local distribution.

Man Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Man Lake's fishery is anchored by muskellunge, with 14 documented species in total — a destination water for muskie anglers. No formal public access is documented at Man Lake — most use is by shoreline residents and their guests. Ice-out has been recorded 9 times at Man Lake, with a median around Apr 23. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.