Robinson Lake

Robinson Lake earns an A — every scored parameter (clarity and phosphorus) rates among the best monitored waters in Bayfield County. clarity and phosphorus 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 Wisconsin lakes fall. Robinson Lake reaches 36 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. Robinson Lake is small — 89 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 52 graded lakes in Bayfield County, Robinson Lake sits at rank 24, above the county median.

An invasive species record — Banded Mystery Snail — has been logged at Robinson Lake; Wisconsin DNR maintains the official infested-waters list. The fishery includes walleye among the lake's 4 documented species — a notable draw for Wisconsin anglers. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.