The Kate Shelley High Bridge, officially called the Boone Viaduct when it was completed in 1901, is one of the highest and longest double-track railroad bridges in the United States. It is located approximately 3 miles (4.8 km) west of Boone, Iowa.

Catherine Carroll Shelley was a midwestern United States railroad heroine and the first woman in the United States to have a bridge named after her, the Kate Shelley High Bridge. She was also one of the few women to have a train named after her, the Kate Shelley 400.