Little Gabbro Lake

Little Gabbro Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. Little Gabbro Lake reaches 26 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 148 acres, Little Gabbro Lake fits the Minnesota median for monitored lakes, with 7.7 miles of shoreline. Little Gabbro Lake ranks 131 of 142 in Lake County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Little Gabbro Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye among the lake's 7 documented species — a notable draw for Minnesota anglers. Public access is available — the lake is on the Minnesota PCA public-access list. 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.