Ahsub Lake

On the LakeGrade rubric, Ahsub Lake pulls an A: clarity at 18.0 ft and phosphorus readings still being added put it in the top bracket for Minnesota.

Trophically, Ahsub Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. At 78 ft of maximum depth, Ahsub Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. At 60 acres, Ahsub Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Ahsub Lake ranks 9 of 142 in Lake County, putting it in the upper tier of locally monitored lakes.

Ahsub Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The fishery is bass-led, with 6 documented species across the lake's records. No formal public access is documented at Ahsub Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.