Breakfast Lake

On the LakeGrade rubric, Breakfast Lake pulls an A: clarity at 41.0 ft and phosphorus readings still being added put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 24 puts Breakfast Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake is compact at 11 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 55 graded lakes in Bayfield County, Breakfast Lake sits at rank 14, above the county median.

Eurasian watermilfoil is established at Breakfast Lake, which can dampen recreational access and pressure the native plant community. The fishery is bass-led, with 2 documented species across the lake's records. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.