| Last updated on November 3, 2020
Big Boy – Back in Steam covers the 1941-1959 history, 2014-2019 restoration, and May 2019 inaugural runs of Union Pacific Big Boy 4-8-8-4 No. 4014 on its original operating territory between Cheyenne, Wyo., and Ogden, Utah, across famous Sherman Hill and Wasatch Grade.
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