Schubert Lake

Schubert Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer. 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. Schubert Lake reaches 24 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 212 acres, Schubert Lake fits the Minnesota median for monitored lakes, with 4.0 miles of shoreline. Schubert Lake ranks 167 of 187 in St. Louis County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Schubert Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Schubert Lake, one of 9 fish species on record for the lake. The lake lacks a documented public access point, so visitor use is limited. Ice-out has been recorded 12 times at Schubert Lake, with a median around Apr 26. 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.