Ashigan Lake

Ashigan Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season.

A TSI near 41 places Ashigan Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake's 59 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. Ashigan Lake covers 153 acres alongside 3.5 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Ashigan Lake ranks 45 of 142 in Lake County — solidly in the upper half of the local distribution.

Ashigan 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 Ashigan Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Ashigan 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.