Lake Helen

On the LakeGrade rubric, Lake Helen pulls an A: clarity at 25.4 ft and 19 µg/L of phosphorus put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Trophically, Lake Helen reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. Lake Helen reaches 20 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 89 acres, Lake Helen sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within Portage County's 29 graded waters, Lake Helen sits at rank 6, near the top of the local distribution.

Lake Helen is on the Wisconsin infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. 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.