Agnes Lake

Agnes Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average.

At a TSI of 53, Agnes Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. A maximum depth of 18 ft puts Agnes Lake in the middle of Minnesota's depth distribution. The lake is compact at 29 acres, with 1.7 miles of shoreline and little volume to buffer nutrient inputs. Agnes Lake ranks 149 of 187 in St. Louis County — at the lower end of the locally monitored distribution.

Agnes Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The fishery is panfish-dominated — bluegill, crappie, and sunfish among the 4 species documented for the lake. The lake lacks a documented public access point, so visitor use is limited. 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.