Devil'S Lake

On the LakeGrade scale Devil'S Lake grades a B, with clarity readings still being added and 22 µg/L of phosphorus placing it above the Wisconsin median.

Mesotrophic conditions dominate at Devil'S 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. Within Forest County's 34 graded lakes, Devil'S Lake ranks 23 — below the local median, though not at the bottom.

No invasive species are currently listed at Devil'S Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Devil'S 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.