City of Los Angeles, City of Portland, and City of San Francisco were combined into one giant train across Wyoming, called by some the "City of Everywhere". The dome diners were removed from the City of Portland in 1968 and the City of Los Angeles by 1970, the dome coaches and dome lounge cars remained until the coming of Amtrak. Amtrak discontinued all UP trains, save for a modified City of San Francisco (via BN to Denver, thence via UP's Overland Route to Ogden and SP to Oakland/San Francisco), when it assumed long-distance passenger rail service throughout the United States on May 1, 1971. Timeline May 1936: The Challenger makes its first run between Chicago, Illinois, and Los Angeles, California. 1937: A second train, the San Francisco Challenger, with service between Chicago and Oakland, California is added to the lineup in cooperation with the Southern Pacific Railroad; the original train is now designated as the Los Angeles Challenger. November 8, 1944: The westward San Francisco Challenger jumps the tracks on a curve at 5:15 a.m. and piles into a ditch three miles west of Colfax, California. Nine people are killed and 93 injured. 1947: The Challenger fleet is withdrawn from service. October 19, 1947: San Francisco Challenger is discontinued when renamed Gold Coast December 8, 1953: The CNW / UP announces that the Challenger service between Chicago and Los Angeles will resume, and will employ all streamlined equipment. January 10, 1954: The first lightweight Challenger enters service. February 1955: a dome coach is added to the Challenger; a dome lounge and dome diner were added to the City of Los Angeles and City of Portland. November 1955: The Milwaukee Road assumes operation of the Challenger between Council Bluffs, Iowa and Chicago, operating out of Union Station. 1956: The Challenger and City of Los Angeles are combined during the off-season. 1970: Dome diners are removed from all UP passenger trains, including the Challenger. The Challenger is combined with the entire City fleet into one train. May 1, 1971: UP ends the Challenger train service as Amtrak takes over long-distance passenger operations in the United States. Equipment The consist of the last train No. 107 to travel over the CNW (westbound) on October 29, 1955 included: EMD E8A Locomotive CNW #5029B Baggage UP #5648 Sleeper UP Alpine View (14 sections) Pacific-series sleeper UP Pacific Beauty (10 roomettes, 6 double bedrooms) Diner (48