Grant Lake

Grant 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.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. Grant Lake is unusually deep for Minnesota at 92 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 214 acres, Grant Lake fits the Minnesota median for monitored lakes, with 3.7 miles of shoreline. Within Beltrami County's 86 graded lakes, Grant Lake ranks 45 — below the local median, though not at the bottom.

Grant Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery is bass-led, with 15 documented species across the lake's records. Public access is available — the lake is on the Minnesota PCA public-access list. 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.