Yankee Lake

Yankee Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake bottoms out at 20 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 14 acres, Yankee Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within the 22 graded lakes of Marinette County, Yankee Lake sits at rank 22, near the bottom of the county list.

Yankee Lake has no invasive species recorded in Wisconsin state databases as of 2024, though prevention practices still apply at all access points. The fishery is bass-led, with 2 documented species across the lake's records. A documented public access point at Yankee Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.