Kabetogama Lake

Kabetogama Lake grades an F: water clarity, phosphorus, and chlorophyll-a all rate poorly, placing it among the most stressed lakes monitored in 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.

At a TSI of 63, Kabetogama Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. The lake's 80 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. With 24,034 acres of surface and 190.5 miles of shoreline, Kabetogama Lake is a large water by Minnesota standards — recreational pressure is spread across a long shoreline. Within the 215 graded lakes of St. Louis County, Kabetogama Lake sits at rank 203, near the bottom of the county list.

Zebra mussel presence at Kabetogama Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The fishery includes walleye alongside the lake's other 16 documented species — a notable draw for Minnesota anglers. A documented public access point at Kabetogama Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a long ice-out record — 84 observations on file, with a median ice-out around Apr 29. 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.