Anne Lake

Anne Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in St. Louis County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. Anne Lake reaches 27 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 8 acres, Anne Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Among the 187 graded lakes in St. Louis County, Anne Lake ranks 45 — in the top quartile locally.

Anne Lake has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. Bass fishing is part of the appeal: the species list runs to 5, anchored by largemouth and/or smallmouth bass. No formal public access is documented at Anne Lake — most use is by shoreline residents and their guests. 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.