Devils Lake

On the LakeGrade scale Devils Lake grades a B, with clarity at 11.0 ft and phosphorus readings still being added placing it above the Wisconsin median.

Mesotrophic conditions dominate at Devils Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Devils Lake sits at rank 32 of 57 in Burnett County, in the lower half of the local distribution.

Devils Lake has no invasive species recorded in Wisconsin state databases as of 2025, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Devils Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.