AllMovie

The "U.P." in the title refers to the Union Pacific railroad, the trail of which is followed by famed frontier scout Buffalo Bill Cody (here played by Roy Stewart). Hired to provide food for the railroad workers during the Union Pacific's Westward expansion, Buffalo Bill also prevents the employees from falling into the hands of hostile Indians. The plot is for the most part a fabrication, as witness the scene in which Buffalo Bill grows wealthy by building a prosperous "whistle stop" along the Union Pacific path. As pointed out by the trade magazine Variety, had Bill become a frontier burgomeister, he would never have had any reason to go on tour with his fabled Wild West Show. Oh, well...if the moviegoer wanted accuracy, he could always go to the library.