A massive locomotive will pass through Colorado

Big Boy, the 1.2M pound locomotive, is coming back to Colorado

DENVER (KDVR) — The world’s largest operating steam locomotive, known as Big Boy No. 4014, is coming back to Colorado — and this time, it's bringing a friend. Union Pacific, a transportation company, announced that the locomotive is coming to Colorado during a limited 2025 excursion. The locomotive is one of eight surviving Big Boys out of the 25 built during World War II. After it traveled over a million miles in its 20 years of service, the lo…

A massive locomotive will pass through Colorado

Union Pacific's Big Boy No. 4014 will visit Colorado, for a limited excursion tour this July. A larger tour is planned in 2026.

Anyone Else Fascinated By Old Locomotives?

Love these old streamliners...