The Sonora Railway was constructed by the Atchison, Topeka & Santa Fe Railway between 1879 and 1882. It ran from Guaymas,
on the west coast of the Mexican state of Sonora, northward to Nogales at the United States / Mexican border. From there
it connected with the New Mexico and Arizona Railroad, which ran to Benson, Arizona, and then over the Southern Pacific to
the tracks of the Santa Fe at Deming, New Mexico. In 1898 the Santa Fe leased the Sonora Railway to the Southern Pacific
in return for the latter railroad's line from Needles to Mojave, California. This arrangement continued until December 1911,
when the Southern Pacific purchased both the Sonora Railway and the New Mexico and Arizona. The following June, the Sonora
Railway became part of the Southern Pacific Railroad in Mexico.
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