409th Avenue in Groton Township, South Dakota

409th Avenue in Brown County is a gravel unclassified road. It runs in a north-south direction and crosses 131st Street, 132nd Street, 133rd Street, 134th Street and US Highway 12 and ends at 135th Street, while the other end is a cul-de-sac. 409th Avenue also exists in Bates Township, East Hanson Township, Riverside Township, Claremont Township and South Detroit Township.