(Photo courtesy Stewart Library, Special Collections) Men who worked on the Transcontinental Railroad in 1869 ride on a float in 1919 during a parade in Ogden to mark the 50th anniversary of the completion of the transcontinental railroad. Photographs taken during the parade are featured in "Spike 50: Golden Spike Parade in 1919,” a free exhibit at Union Station, 2501 Wall Ave., Ogden, through May 31.