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

420th Avenue in Day County is a gravel unclassified road. It runs in a north-south direction starting from 142nd Street and crosses 143rd Street, 145th Street, 146th Street, 149th Street and 150th Street and ends at 151st Street. It connects Troy Township and Valley Township. 420th Avenue also exists in Bristol Township, Union Township and Homer Township.