Legendary ‘Big Boy’ Train Set for a Grand Return in 2026
Almost every child experiences a fascination with trains at some point, drawn to the rhythmic chugging, the motion across the tracks, and the sense of adventure that steam locomotives evoke. While some eventually move on, many never lose their love for these mechanical marvels. Today, enthusiasts and tourists alike can witness one of the most impressive examples of steam engineering: the iconic Big Boy locomotive.
Out of the eight Big Boy engines that still exist, only No. 4014 is operational. Originally built during World War II to haul heavy freight, these machines are enormous in both size and power. No. 4014 retired in 1961 and spent decades as a museum exhibit before being restored to active service in 2019. Due to its massive dimensions, it has primarily operated in the Midwest and the West Coast, but plans are now underway for an ambitious cross-country journey.
To mark America’s 250th anniversary, Union Pacific, the owner of Big Boy No. 4014, revealed plans for the locomotive’s first nationwide tour. This journey will include stops that celebrate the nation’s history and progress. While the precise schedule has not yet been released, fans and train enthusiasts can stay informed through Union Pacific’s announcements. Despite its advanced articulated design, the 1.2 million-pound engine faces limitations on certain tracks and bridges, and tight curves remain challenging for its 31-foot length.
The Big Boy’s Storied History
Big Boy No. 4014 was among 25 locomotives commissioned by Union Pacific to support wartime freight needs. Featuring a 4-8-8-4 wheel configuration—four leading wheels, two sets of eight driving wheels, and four trailing wheels—these engines were designed with articulated frames to navigate narrow curves. They were engineered to haul freight over the rugged Wasatch Mountains in Utah and across Wyoming, performing the work of three smaller engines by pulling up to 120 freight cars at speeds of 40 mph.
Today, only eight of these monumental engines remain, and No. 4014 is the sole operational locomotive. The other seven are preserved in museums across the United States. Following its retirement, No. 4014 was displayed at the RailGiants Train Museum in Pomona, California. Unlike many museum-bound steam engines that never run again, this locomotive was meticulously maintained with support from grants, including assistance from companies such as ExxonMobil and Boeing. Union Pacific acquired No. 4014 in 2013, demonstrating the company’s enduring commitment to steam heritage.
A Monumental Restoration Effort
In July 2013, Union Pacific announced an ambitious plan to restore Big Boy No. 4014, a project many enthusiasts thought might never happen. Before deciding on No. 4014, the company assessed all surviving locomotives to determine which was best suited for restoration. No. 4014 stood out due to the museum’s dedicated maintenance, including decades of careful lubrication and preservation of its running gear.
A dedicated team of nine full-time engineers spent over two years bringing the massive locomotive back to life. While its boiler was in relatively good condition compared to other surviving Big Boys, the restoration was still a monumental undertaking. The Cheyenne, Wyoming facility where the work took place had been repurposed for diesel engines, requiring extensive modifications. Many original tools had to be located or recreated, and numerous components were fabricated from scratch to meet modern safety standards.
Originally a coal-burning engine, the Big Boy required enormous quantities of fuel and water, consuming its tender supply in roughly two hours. To enable longer excursions, the restoration team converted the locomotive to run on oil instead. Today, the engine can be tracked and followed by enthusiasts, allowing fans to stay updated on its tours and events.
Looking Forward to the 2026 Tour
The upcoming 2026 nationwide journey will allow train enthusiasts from across the country to experience one of the most remarkable machines in American rail history. Union Pacific plans to highlight stops that honor the country’s industrial and cultural heritage, offering a rare opportunity to witness a true engineering marvel in action.
The Big Boy No. 4014 represents more than just a locomotive; it embodies a legacy of innovation, strength, and dedication. Its return to the rails is a testament to the passion of engineers, historians, and volunteers who ensured this historic machine continues to captivate new generations.
As the countdown to the 2026 tour begins, steam fans and railroad aficionados are preparing for a chance to see history come alive. The Big Boy’s return promises an unforgettable spectacle, celebrating both the past and the enduring allure of America’s golden age of railroading.
