Deep Hole Lake

Deep Hole Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Wisconsin average. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. Deep Hole Lake reaches 22 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. Deep Hole Lake is small — 6 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Deep Hole Lake ranks 27 of 33 in Langlade County — at the lower end of the locally monitored distribution.

Deep Hole Lake has at least one documented invasive species (Rusty Crayfish), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. The fishery is bass-led, with 2 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.