Twin Lake North

Twin Lake North comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth.

A TSI near 44 places Twin Lake North in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake bottoms out at 25 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Twin Lake North is small — 52 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Twin Lake North sits at rank 37 of 52 in Bayfield County, in the lower half of the local distribution.

Twin Lake North has no invasive species recorded in Wisconsin state databases as of 2023, though prevention practices still apply at all access points. The fishery is bass-led, with 3 documented species across the lake's records. 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.