Loco No. 3440

Loco No. 3440 is a famous steam locomotive built in 1944 that served the Union Pacific Railroad in the United States. It is a massive engine designed to pull heavy trains over long distances, especially through mountainous terrain. Known for its distinctive design and powerful performance, No. 3440 has become an iconic symbol of American railroading heritage. After retiring from active service, it was preserved for historical and educational purposes, often seen at train museums and special events, showcasing the engineering marvels of the steam era.