Little Cowhorn Lake

Little Cowhorn Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. 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.

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. A maximum depth of just 12 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. Little Cowhorn Lake covers 181 acres alongside 2.4 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 141 graded lakes of Itasca County, Little Cowhorn Lake sits at rank 134, near the bottom of the county list.

Little Cowhorn Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Little Cowhorn Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Little Cowhorn Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.