Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Mankato Subdivision or Mankato Sub is a railway line operated by the Union Pacific Railroad. It runs generally southwest, starting at Chestnut Street in Saint Paul, Minnesota where it crosses the Mississippi River, then runs south along the Mississippi and then the Minnesota River to Mankato, where it turns away from the river and continues to St. James. At that point, Union Pacific rails continue southwest toward Sioux City, Iowa as the railroad's Worthington Subdivision.