MarketSouthern Pacific Railroad of Mexico
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Southern Pacific Railroad of Mexico

The Southern Pacific Railroad of Mexico was a railroad subsidiary of the Southern Pacific Railroad in Mexico, operating from Nogales, Sonora, to Mazatlán, Sinaloa. The Sonora Railway was constructed by the Atchison, Topeka and Santa Fe Railway between 1879 and 1882, along with the connecting New Mexico and Arizona Railroad from Nogales, Arizona to Fairbank and Benson, Arizona. In 1898 the Santa Fe leased the line 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.

Passenger operations
Until the mid-20th century it operated several local and mixed trains, in addition to the following long distance night train: • El Costeno, #9 northbound, #10 southbound – NogalesGuadalajaraMexico City, D.F., with coordinated service with the Southern Pacific Railroad's Argonaut train to Los Angeles (#6 eastbound, #5 westbound). The train was renamed as El Yaqui, #9 northbound, #10 southbound by 1949, with a bus replacing the section between Tucson and Nogales. When the SP of Mexico was absorbed into the Ferrocarril de Pacifico El Yaqui took the numbers #1 northbound, #2 southbound. ==References==
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