Cajon Pass is located in southern California, USA, about 75 miles from Los Angeles. The rails from San Bernardino climb the San Gabriel Mountains up to a 3,800 feet elevation then descend to Victorville towards the Mojave Desert.
A bit of history ...
The railroad history of the Pass begins in 1885, when Santa Fe Railway built the
first line, at that time with a 3% grade and single track. Today it is called the 'South Track' .
In 1905 the traffic grew, as a result of the passage rights obtained by the Los Angeles, San
Pedro & Salt Lake Railway, and this compelled Santa Fe to double-track the line. So in 1913 was
built the 'North Track' , with two short tunnels in Alray and a longer and less steep 2.2% grade
between Cajon and Summit.
In 1967 Southern Pacific, to connect Palmdale with the Los Angeles basin and his yard in Colton
built the single track Palmdle cut-off, which from San Bernardino to Summit follow Santa Fe's
North track on a slight elevation.
Today four companies use the Pass : Burlington Northern Santa Fe, Union Pacific, Southern Pacific
and Amtrak. While SP uses its own line, the other three share Santa Fe tracks : usually eastbound
trains use the North track and westbound trains use the South track. Amtrak trains use the South