Kirby Lake

Kirby Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Mesotrophic conditions dominate at Kirby Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 19 ft puts Kirby Lake in the middle of Wisconsin's depth distribution. The lake is compact at 98 acres, with partial shoreline records and little volume to buffer nutrient inputs. Kirby Lake ranks 14 of 37 in Barron County — solidly in the upper half of the local distribution.

Kirby 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.