UP Big Boy 2026 tour to begin with trip to California

A black steam locomotive leads a train through a rural farm setting

CHEYENNE, Wyo. — Union Pacific’s Big Boy will return to California this spring in the first leg of its planned coast-to-coast trip for America’s 250th anniversary, the railroad has announced. The first segment of the trip will be a round trip from Cheyenne, Wyo., beginning March 29 and concluding April 24, with two major public […]

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How PTC came to Union Pacific’s Big Boy

Editor’s note: The January 2026 issue of Trains Magazine includes author Greg Richardson’s article on the development of positive train control, “The road to PTC,” viewed primarily through the lens of his time in Union Pacific’s PTC program. Space limitations precluded inclusion of his look at development of PTC for Big Boy No. 4014; we […]

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Broadway Limited HO UP Big Boy

Color photo showing smokebox front and headlight on HO scale steam locomotive. "Big Boy" written on front of smokebox; number boxes display "X4014"

Broadway Limited HO UP Big Boy Scale: HO (1:87.1) Price: Stealth (no sound), $749.99; with dual-mode Paragon4 sound decoder, $849.99 Era: 1941 to present (varies based on paint scheme) Manufacturer: Broadway Limited Imports, 9 East Tower Circle, Ormond Beach, FL 32174; 386-673-8900; broadway-limited.com Broadway Limited HO UP Big Boy features: Back-electromotive-force decoder Built-in capacitor pack […]

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Three superlative Union Pacific steam locomotives

People line fence to photograph smoking steam locomotive

No railroad was better equipped to shoulder the heavy burden of wartime traffic thanks to the three types of Union Pacific steam locomotives that constituted its front line of defense: the 4-6-6-4 Challenger, arguably the most successful simple articulated ever made; the 4-8-8-4 Big Boy, which easily wore the mantle “world’s largest steam locomotive”; and […]

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News photo: A ‘Big’ deal in Colorado

Large steam locomotive surrounded by spectators

GREELEY, Colo. — Union Pacific’s Big Boy began its only scheduled trip of 2025 today (July 17), heading from its home base in Cheyenne, Wyo., to Denver as part of a round trip for the annual Cheyenne Frontier Days rodeo. The 4-8-8-4 is accompanied by the railroad’s Abraham Lincoln diesel, No. 1616. Today’s servicing stop […]

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Union Pacific Big Boy-Lincoln diesel trip set for July

Large black steam locomotive with train against a dark blue sky.

CHEYENNE, Wyo. — Union Pacific Big Boy No. 4014 and the railroad’s diesel honoring Abraham Lincoln will make a round trip between Cheyenne and Denver in July, with a public whistle-stop appearance in Greeley, Colo., in each direction. The railroad will also auction off four cab rides to support the Union Pacific Railroad Museum in […]

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