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The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962.
Big Boy No. 4014. Twenty-five Big Boys were built exclusively for Union Pacific Railroad, the first of which was delivered in 1941. The locomotives were 132 feet long and weighed 1.2 million pounds.
Earlier this summer, Union Pacific's legendary Big Boy No. 4014 toured in five states during its 2024 Westward Bound Tour from Wyoming to California. In addition, this mighty steam locomotive was on public display for two days each in Roseville, California and Ogden, Utah.
Union Pacific Railroad's 4014 "Big Boy" is the largest operational steam locomotive in the world. It was restored by the railroad in 2019 in celebration of the 150th anniversary of the...
Union Pacific 4014 is a steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet. It is a four-cylinder simple articulated 4-8-8-4 "Big Boy" type built in 1941 by the American Locomotive Company (ALCO) at its Schenectady Locomotive Works. It was assigned to haul heavy freight trains in the Wasatch mountain range.
Big Boy, one of the largest and most powerful series of steam locomotives ever built. Produced from 1941 to 1944 by the American Locomotive Company of Schenectady, N.Y., exclusively for the Union Pacific Railroad, the Big Boy locomotives were designed primarily to handle heavy freight traffic in.
The Union Pacific Big Boy locomotives are some of the largest and most popular steam locomotives ever made. We look at the history of these massive locomotives.