Three Lake

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

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. A maximum depth of 37 ft puts Three Lake in the middle of Minnesota's depth distribution. Three Lake covers 904 acres alongside 19.0 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 142 graded lakes of Lake County, Three Lake sits at rank 107, near the bottom of the county list.

No invasive species are currently listed at Three Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Three Lake, one of 10 fish species on record for the lake. No formal public access is documented at Three Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.