August Lake

On the LakeGrade scale August Lake grades a B, with clarity at 4.7 ft and 13 µg/L of phosphorus placing it above the Minnesota median. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

A TSI near 48 places August Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. August Lake reaches 19 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 229 acres, August Lake fits the Minnesota median for monitored lakes, with 6.0 miles of shoreline. Within Lake County's 159 graded lakes, August Lake ranks 91 — below the local median, though not at the bottom.

No invasive species are currently listed at August Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at August Lake, one of 7 fish species on record for the lake. Public access is available — the lake is on the Minnesota PCA public-access list. 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.