Union Pacific No. 3976

Union Pacific No. 3976 was a class 4664-4 4-6-6-4 Challenger Steam Locomotive, built in 1943 by the American Locomotive Co. for Union Pacific railroad. The Challengers were designed & primarily used for freight service, but occasionally assigned to passenger duty through the mountains of California and Oregon.
Category:Steam locomotives
Category:Tender locomotives
Category:American locomotives
Category:4-6-6-4 locomotives
Category:4-6-6-4 steam locomotives
Category:ALCO locomotives
Category:Built in 1943
Category:Scrapped locomotives
Category:Articulated locomotives
Category:Union Pacific locomotives
Category:Locomotives
Category:Standard gauge locomotives
Category:Standard gauge locomotives of the United States
Category:4 foot 8 1⁄2 inch gauge
Category:Scrapped steam locomotives