Ahmakose Lake

On the LakeGrade rubric, Ahmakose Lake pulls an A: clarity at 18.5 ft and phosphorus readings still being added put it in the top bracket for Minnesota. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

Trophically, Ahmakose Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. The lake's 68 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. Ahmakose Lake is small — 43 acres alongside 1.4 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 142 graded lakes in Lake County, Ahmakose Lake ranks 14 — in the top quartile locally.

Ahmakose Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Ahmakose Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Ahmakose Lake — most use is by shoreline residents and their guests. 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.