Imogene Lake

On the LakeGrade rubric, Imogene Lake pulls an A: clarity at 32.8 ft and 15 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.

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. A maximum depth of 41 ft puts Imogene Lake in the middle of Wisconsin's depth distribution. The lake is compact at 61 acres, with partial shoreline records and little volume to buffer nutrient inputs. Imogene Lake ranks 79 of 202 in Vilas County — solidly in the upper half of the local distribution.

Imogene Lake has no invasive species recorded in Wisconsin state databases as of 2025, though prevention practices still apply at all access points. The fishery is bass-led, with 3 documented species across the lake's records. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.