Union Pacific Challenger
Videos
The Union Pacific Challengers are a type of simple, articulated, 4-6-6-4 steam locomotive built by American Locomotive Company from 1936 to 1944 and operated by the Union Pacific Railroad until the la
Union Pacific 3814, one of the first challengers built for the railroad
Union Pacific Challenger 3985 01
Union Pacific Big Boy
Videos
The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company in Schenectady, New York, between 1941 and 1944 and operated by the U
Union Pacific Challenger
…freight service, but a few were assigned to the Portland Rose and other passenger trains. Their design and operating experience shaped the design of the Big Boy locomotive type, which in turn, shaped the design of the last three orders of Challengers. Two Union Pacific Challengers survive. The most notable is…
Publicity photo of Union Pacific Big Boy No. 4000, the first of the class, taken in 1941
The cab controls of No. 4005 at the Forney Transportation Museum in Denver, Colorado.
A close-up of a Hancock long-bell 3-chime "steamboat" whistle used on No. 4017.
No. 4014 travels the Sacramento Subdivision towards Roseville, California, in July 2024.