Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet. Built in November 1941 by the American Locomotive Company (ALCO) in Schenectady, New York, it was assigned to haul heavy freight trains in the Wasatch mountain range. The locomotive was retired from revenue service on July 21, 1959, and donated to the Railway & Locomotive Historical Society in late 1961. It was displayed in Fairplex at the RailGiants Train Museum in Pomona, California.