Little John Jr Lake

Little John Jr Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. 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.

Mesotrophic conditions dominate at Little John Jr 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 Vilas County's 191 graded lakes, Little John Jr Lake ranks 120 — below the local median, though not at the bottom.

An invasive species record — splake — has been logged at Little John Jr Lake; Wisconsin DNR maintains the official infested-waters list. 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.