Lake Nebagamon

On the LakeGrade scale Lake Nebagamon grades a B, with clarity at 7.0 ft and 18 µg/L of phosphorus placing it above the Wisconsin median. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

Mesotrophic conditions dominate at Lake Nebagamon: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's 56 ft maximum depth is in the upper tier for Wisconsin — deep enough for cold-water fish to find refuge in summer. Lake Nebagamon covers 986 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 44 graded lakes in Douglas County, Lake Nebagamon sits at rank 13, above the county median.

Lake Nebagamon has at least one documented invasive species (Chinese Mystery Snail), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. The fishery includes walleye alongside the lake's other 5 documented species — a notable draw for Wisconsin anglers. A documented public access point at Lake Nebagamon makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.