
A westbound Union Pacific manifest freight works its way toward Los Angeles in October 2013 in the “Blue Cut” section of California’s famed Cajon Pass. With the lead locomotives a mile away in the distance, you gain a better perspective of magnitude of the San Gabriel Mountains and the challenges railroads overcame more than 125 years ago. Photo by Steve Sweeney

First, manifest trains don’t normally go to Los Angeles, but West Colton Classification Yard in Colton-Fontana, Calif., about 50-60 miles east of Los Angeles. Second, depending on when the timetable was changed, the train is eastbound or southbound.