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.

Mesotrophic conditions dominate at Three Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 37 ft puts Three Lake in the middle of Minnesota's depth distribution. The lake's 904 acres and 19.0 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Three Lake ranks 107 of 142 in Lake County — at the lower end of the locally monitored distribution.

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. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.