Wolf Lake

Wolf Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. Wolf Lake reaches 47 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. Wolf Lake is small — 75 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Wolf Lake sits at rank 6 of 10 in Fond du Lac County, in the lower half of the local distribution.

Eurasian watermilfoil is established at Wolf Lake, which can dampen recreational access and pressure the native plant community. The fishery includes walleye among the lake's 4 documented species — a notable draw for Wisconsin anglers. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.