Leech Lake

Leech Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade.

Mesotrophic conditions dominate at Leech Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Leech Lake ranks 123 of 132 in Cass County — at the lower end of the locally monitored distribution.

Zebra mussels have been documented at Leech Lake, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. The state fisheries records do not list documented species for Leech Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Leech Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been logged at Leech Lake more than two dozen times, putting the median around Apr 28 — a useful baseline for tracking climate trends. 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.