Horseshoe Lake

Horseshoe Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. The lake's 53 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. At 224 acres, Horseshoe Lake fits the Minnesota median for monitored lakes, with 4.1 miles of shoreline. Horseshoe Lake ranks 13 of 31 in Chisago County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Horseshoe Lake — the lake remains off the Minnesota infested-waters roster. Bass fishing is part of the appeal: the species list runs to 14, anchored by largemouth and/or smallmouth bass. Public access is available — the lake is on the Minnesota PCA public-access list. Multiple sampling years from Minnesota PCA volunteers and partner agencies back the grade, so the letter should hold steady absent a major watershed shift.