Rockstad Lake

Rockstad Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

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. Rockstad Lake reaches 18 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 142 acres, Rockstad Lake fits the Minnesota median for monitored lakes, with 2.0 miles of shoreline. Within the 40 graded lakes of Clearwater County, Rockstad Lake sits at rank 39, near the bottom of the county list.

No invasive species are currently listed at Rockstad Lake — the lake remains off the Minnesota infested-waters roster. 4 fish species are on record, with panfish making up the recreational core. A documented public access point at Rockstad 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.