Little John Jr Lake

On the LakeGrade rubric, Little John Jr Lake pulls an A: clarity at 32.8 ft and 26 µg/L of phosphorus put it in the top bracket for Wisconsin. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI value of 39 puts Little John Jr Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. 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. Little John Jr Lake ranks 167 of 202 in Vilas County — at the lower end of the locally monitored distribution.

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