Horseshoe Lake

The LakeGrade rubric puts Horseshoe Lake at a C: clarity at 8.0 ft, phosphorus readings still being added, and a TSI of 47 signal an intermediate trophic state. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. A maximum depth of 40 ft puts Horseshoe Lake in the middle of Minnesota's depth distribution. Horseshoe Lake covers 205 acres alongside 5.9 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within Lake County's 142 graded lakes, Horseshoe Lake ranks 88 — below the local median, though not at the bottom.

Horseshoe Lake has no invasive species recorded in Minnesota state databases as of 2021, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Horseshoe Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Horseshoe Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.