Soledad Canyon was a vital part of Los Angeles' transportation history. Transit between Los Angeles and the Central Valley was always difficult–in the "Gold Rush era" and stagecoach days the ride was extremely difficult, almost straight up-and-down through
San Fernando Pass, up San Francisquito Canyon, and over
Tejon Pass. In 1856, Lieutenant Williamson, on a railroad surveying party, "discovered" that the pass, sometimes named "Williamson Pass", could provide the lower grades to make Los Angeles–Central Valley train travel possible by the roundabout detour all the way to Mojave, and over Tehachapi Pass, almost 70 miles farther than the direct Interstate 5 used today by trucks and autos. In the mid 1870s, the first rail line was laid down in Soledad Canyon. On September 5, 1876, then president of the
Southern Pacific Railroad Charles Crocker drove a
golden spike at
Lang Southern Pacific Station to complete the
San Joaquin Valley Line, the first rail line linking
Los Angeles to
San Francisco and the
First transcontinental railroad. From 1921 to 1989, the
Soledad Canyon Sand and Gravel Mining Project mined a downstream region of the canyon for
sand and
gravel. In 2000, the
Bureau of Land Management awarded two 10-year leases to Transit Mixed Concrete (who later sold the contract to the
Cemex Corporation) to mine the site. This resulted in a protracted legal battle between the Bureau of Land Management, the Cemex Corporation, and the
City of Santa Clarita. In 2015, the Bureau of Land Management issued a cancellation of the contract, effectively ending almost century of mining within the canyon. ==Transportation==