421st Avenue in Beaver Township, South Dakota

421st Avenue in Miner County is an unpaved unclassified road. It runs in a north-south direction and crosses 244th Street, 220th Street, 221st Street, 222nd Street, 223rd Street, 224th Street, 225th Street, 226th Street, 227th Street, 228th Street, 231st Street and 232nd Street. It connects Clinton Township, Beaver Township, Miner Township and Redstone Township.