Horseshoe Lake

Horseshoe Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

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 57 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. Horseshoe Lake covers 629 acres alongside 13.4 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Horseshoe Lake ranks 47 of 55 in Stearns County — at the lower end of the locally monitored distribution.

Zebra mussels have been documented at Horseshoe Lake, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. Muskie are on the species list at Horseshoe Lake, alongside the lake's 25 other documented fish. A documented public access point at Horseshoe Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.