481st Avenue in Alton Township, South Dakota

481st Avenue in Brookings County is an unclassified road. It runs in a north-south direction and crosses 210th Street, 211th Street, US Highway 14, 213th Street, 214th Street, 215th Street, 216th Street and SD Highway 324 and ends at SD Highway 13, while the other end is a cul-de-sac. It connects Alton Township and Parnell Township. 481st Avenue also exists in Oaklake Township and Sherman Township.