The Minnesota 400 was a streamlined passenger train operated by the Chicago and North Western Railway on its southern Minnesota line between Mankato, Minnesota and Wyeville, Wisconsin. It began running in 1936. In 1950 it was extended to run between Chicago, Illinois and Huron, South Dakota and renamed the Dakota 400. It would be further extended to Rapid City, South Dakota, before being cut back to Mankato, in 1960. This final iteration was named the Rochester 400 and it ceased operation in 1963.