420th Avenue in Union Township, Day County, South Dakota

420th Avenue in Day County is an unpaved unclassified road. It runs in a north-south direction starting from 124th Street and crosses 125th Street, 127th Street, 128th Street, 129th Street, 130th Street, 130A Street, 131st Street and 133rd Street and ends at 134th Street. It connects Union Township and Homer Township. 420th Avenue also exists in Valley Township and Bristol Township.