Chief In Colorado. One can almost feel the spirit of the Santa Fe Railroad in the air as Amtrak Train 4 (Southwest Chief) travels through Trinidad, Colorado on April 14, 2022 AMTK 161 (P42DC, Phase I, 50th Anniversary) through Trinidad, Colorado on April 14, 2022. Built through mountains and canyons, the route of the Chief parallels Interstate 25 through this area but there are few other signs of modern development. The train is carries on the legacy of the Atchison, Topeka and Santa Fe Railway's "Super Chief", which was inaugurated in 1936 and with the implementation of the Rail Passenger Service Act of 1970 became part of Amtrak on May 1, 1971. Phase I paint was introduced in 1972 as Amtrak began to develop its own branding distinct from the then freight only railroads that had left he passenger business.
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