Mora Lake

Mora Lake earns a D — measurements through 2023 show persistent nutrient pressure that limits clarity through the summer.

At a TSI of 54, Mora Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. A maximum depth of 24 ft puts Mora Lake in the middle of Minnesota's depth distribution. Mora Lake is small — 75 acres alongside 3.0 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Within Kanabec County's 7 graded lakes, Mora Lake ranks 4 — below the local median, though not at the bottom.

Mora Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Mora Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Mora Lake — most use is by shoreline residents and their guests. 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.