South Silver Lake

South Silver Lake earns an F: phosphorus readings still being added and clarity at 3.0 ft signal heavy nutrient loading from the surrounding watershed.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. The lake bottoms out at 22 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake's 252 acres and 4.0 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. South Silver Lake ranks 6 of 7 in Martin County — at the lower end of the locally monitored distribution.

South Silver Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Walleye are documented at South Silver Lake, one of 16 fish species on record for the lake. A documented public access point at South Silver Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been logged at South Silver Lake more than two dozen times, putting the median around Mar 25 — a useful baseline for tracking climate trends. 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.