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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.
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.
Big Boy No. 4014 was delivered to Union Pacific in December 1941. The locomotive was retired in December 1961, having traveled 1,031,205 miles in its 20 years in service. Union Pacific reacquired No. 4014 from the RailGiants Museum in Pomona, California, in 2013, and relocated it back to Cheyenne to begin a multi-year restoration process.
Track Union Pacific's Big Boy No. 4014 as it travels across our 23 state network. Stay at least 25 feet back from all railroad tracks, not only for your own safety, but also for your best photos and videos!
Twenty-five Big Boy engines were built in the 1940s to carry heavy freight through the Rocky Mountains. No. 4014 was moved from a California museum to Cheyenne in 2013 and returned to service in 2019, according to Union Pacific. It’s one of seven Big Boy locomotives on display, including one at Denver’s Forney Museum.
A: Big Boy was built to go as fast as 70 mph, but the locomotives rarely ran more than 50 mph, a speed the UP still finds convenient. Q: How much can it pull? A: With more than 6,000-horsepower, Alco and Union Pacific designed Big Boy to pull a 3,600-ton train across the mountains of Utah and Wyoming.
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.
Union Pacific 4012, nicknamed "Big Boy", is a 4-8-8-4 type locomotive built by American Locomotive Company in November 1941. It is among the world's largest steam locomotives. One of 25 built, No. 4012 is one of eight of its type to survive the advent of the diesel era.
The Union Pacific 'Big Boy' is arguably the most famous locomotive in the USA and is known by railfans across the globe. It remains the most powerful steam locomotive in the world and charts high on the all-time lists of longest and heaviest steam locomotives ever built.
Union Pacific’s Big Boy No. 4014 – the iconic, one-million-pound steam locomotive – made a stop in Denver Wednesday morning, and Airtracker7 was overhead.