Fourteen Lake

Fourteen Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.

A TSI near 44 places Fourteen Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Fourteen Lake is a shallow lake at 15 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. The lake's 386 acres and 3.8 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Among the 187 graded lakes in St. Louis County, Fourteen Lake sits at rank 51, above the county median.

Fourteen Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Walleye are documented at Fourteen Lake, one of 7 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.