Tenmile Lake

Tenmile Lake grades an F: water clarity, phosphorus, and chlorophyll-a all rate poorly, placing it among the most stressed lakes monitored in Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

At a TSI of 67, Tenmile Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Tenmile Lake is a shallow lake at 12 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. Tenmile Lake covers 266 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Tenmile Lake ranks 33 of 37 in Barron County — at the lower end of the locally monitored distribution.

An invasive species record — Chinese Mystery Snail — has been logged at Tenmile Lake; Wisconsin DNR maintains the official infested-waters list. Walleye are documented at Tenmile Lake, one of 5 fish species on record for the lake. A documented public access point at Tenmile Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.