page_title: Altoona Subdivision
section_title: Twin Cities 400
hierarchical_section_title: Altoona Subdivision / Passenger operations / Twin Cities 400
caption_attribution_description: Postcard of the diesel-powered 400.
context_page_description: The Altoona Subdivision or Altoona Sub is a 90.7-mile railway line owned and operated by the Union Pacific Railroad in the states of Minnesota and Wisconsin. The line originates in Saint Paul, Minnesota, crosses the St. Croix River on the Hudson Bridge into Hudson, Wisconsin, and eventually terminates in Altoona, Wisconsin. This subdivision is formerly a Chicago and North Western Railway mainline, on which the Twin Cities 400 operated in the mid 1900s.
context_section_description: The Altoona Subdivision was part of the Twin Cities 400's route from 1935 to 1963 when it was discontinued. The "400" operated between Chicago and Saint Paul, with a final stop in Minneapolis. The Twin Cities 400 experienced great success, resulting in the creation of an entire fleet of trains carrying the "400" name. These trains earned Chicago and North Western the nickname "Route of the 400".
caption: A 1951 Twin Cities 400 postcard
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