Raddison Lake

Raddison Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 39 puts Raddison Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake bottoms out at 40 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 204 acres, Raddison Lake fits the Minnesota median for monitored lakes, with 3.8 miles of shoreline. Within Itasca County's 141 graded lakes, Raddison Lake ranks 90 — below the local median, though not at the bottom.

Raddison Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery is bass-led, with 8 documented species across the lake's records. 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.