 From there the highway travels northwesterly through Royalton Township through farm fields parallel to the St. Joseph River.M-139 follows Niles Road to the community of Scottdale where it turns northward along Scottdale Road at an intersection with M-63.M-139 crosses the St. Joseph River one last time south of the interchange with I-94 at its exit 28; M-139 then passes through the community of Fair Plain and enters the eastern edge of Benton Harbor.