Southern Pacific Railroad began with a simple idea: to connect San Francisco
and San Diego, California, by rail. A century later, Southern Pacific had become
one of the largest railroads in America, with lines that stretched from coast
to coast (connecting to New York via Morgan Line steamships) and from the
south to the northwest. In 1959, SP moved more ton-miles of freight than any
other U.S. railroad. Engines featured here reach back to the era of SP steam, and
forward to the diesels of the 1970s.