399th Avenue in Union Township, South Dakota

399th Avenue in Davison County is an unpaved residential street. It runs in a north-south direction and crosses 255th Street, 256th Street, 259th Street, 261st Street and 264th Street and ends at 268th Street, while the other end is a cul-de-sac. It connects Mount Vernon Township, Union Township and Baker Township. 399th Avenue also exists in Blendon Township.