Wolf Lake

Wolf Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. High phosphorus is the leading drag on the score — likely from upland agriculture, lawn runoff, or in-lake sediment release.

Mesotrophic conditions dominate at Wolf Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. 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 7 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 alongside the lake's other 4 documented species — a notable draw for Wisconsin anglers. Public access is available — the lake is on the Wisconsin DNR 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.