Mcguire Lake

On the scoring rubric Mcguire Lake grades a D: clarity at 6.0 ft and phosphorus readings still being added keep it in the lower bracket for Itasca County.

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. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Within the 141 graded lakes of Itasca County, Mcguire Lake sits at rank 131, near the bottom of the county list.

Mcguire Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Mcguire Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Mcguire Lake — most use is by shoreline residents and their guests. The lake has a long ice-out record — 41 observations on file, with a median ice-out around Apr 16. 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.