Skull Lake

Skull Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. A maximum depth of 38 ft puts Skull Lake in the middle of Minnesota's depth distribution. Skull Lake is small — 29 acres alongside 1.0 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Skull Lake sits at rank 75 of 142 in Lake County, in the lower half of the local distribution.

Skull Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.