The Turtle-Flambeau Flowage is a 12,942 acres (52.37 km2) lake in Iron County, Wisconsin. It has a maximum depth of 15 meters and is the seventh largest lake in the state of Wisconsin by surface area. The flowage is home to unique wetland patterns and plant species as well as several species of sport and game fish, including Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye and Sturgeon. The lake's water clarity is low, but can vary in different locations in the lake. Fishing, camping, boating, and hunting are popular activities on the flowage, and Ojibwe people traditionally harvest fish and game on the lake. Environmental concerns on the flowage include mercury contamination, algal blooms, and several types of invasive species.