Long Lake

Long Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 3,290 acres, Long Lake is one of the larger lakes in Washburn County, with partial shoreline records supporting multiple distinct use patterns. Within Washburn County's 47 graded lakes, Long Lake ranks 24 — below the local median, though not at the bottom.

Long Lake has no invasive species recorded in Wisconsin state databases as of 2026, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Long Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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.