Granite Lake at

On the LakeGrade rubric, Granite Lake at pulls an A: clarity at 19.7 ft and 24 µg/L of phosphorus put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 42 places Granite Lake at in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Granite Lake at reaches 34 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 155 acres, Granite Lake at fits the Wisconsin median for monitored lakes, with partial shoreline records. Granite Lake at sits at rank 20 of 38 in Barron County, in the lower half of the local distribution.

Granite Lake at has at least one documented invasive species (Curly-Leaf Pondweed), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. The fishery includes walleye alongside the lake's other 4 documented species — a notable draw for Wisconsin anglers. Public access is available — the lake is on the Wisconsin DNR public-access list. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.