Brant Lake is a 1,046-acre natural glacial lake located approximately 1½ miles north of Chester, South Dakota. As the final lake in a chain of four natural lakes formed by receding glaciers, Brant Lake benefits from better water quality and clarity compared to the upstream lakes Herman, Madison, and Round. The lake has a maximum depth of 14 feet with an average depth of 10 feet, and features diverse habitat including an irregular rocky shoreline, rocky points, offshore humps, and aquatic vegetation. Submerged aquatic vegetation like sago pondweed and floating leaf plants are typically more abundant here than in other lakes in the chain. The west end of the lake is characterized by emergent cattails. Brant Lake serves as the headwaters for Skunk Creek, which eventually flows into the Big Sioux River in Sioux Falls.