DENVER (KDVR) — One of the world’s largest locomotives passed through Colorado in October, operating much like it did when it was first built in the mid-1900s. The train, known as Big Boy No.

A 1.2-million-pound "Big Boy" locomotive returned Thursday to Fort Worth, delighting railfans who traveled from across the state to see the 83-year-old relic. The Union Pacific Big Boy No.

CHEYENNE — Union Pacific Railroad ended its eight-week Big Boy No ... 7,175 locomotives (as of December 2023) over 32,200 mile routes in 23 U.S. states west of Chicago and New Orleans.