Sidie Hollow Lake

Sidie Hollow Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Vernon County. 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.

Trophically, Sidie Hollow Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. A maximum depth of 22 ft puts Sidie Hollow Lake in the middle of Wisconsin's depth distribution. The lake is compact at 35 acres, with partial shoreline records and little volume to buffer nutrient inputs.

An invasive species record — Curly-Leaf Pondweed — has been logged at Sidie Hollow Lake; Wisconsin DNR maintains the official infested-waters list. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at Sidie Hollow 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.