Wood Lake

Wood Lake sits at the top of the Wisconsin DNR grading rubric with an A, a mark reached by the cleanest lakes in Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. Wood Lake is unusually deep for Wisconsin at 53 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 82 acres, Wood Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Wood Lake ranks 1 of 14 in Marquette County, putting it in the upper tier of locally monitored lakes.

Eurasian watermilfoil has been documented at Wood Lake, requiring shoreline management to keep dense mats from crowding native vegetation. 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.