The California Zephyr is a long-distance passenger train operated by Amtrak between Chicago and the San Francisco Bay Area (at Emeryville), via Omaha, Denver, Salt Lake City, and Reno. At , it is Amtrak's longest daily route, and second-longest overall after the Texas Eagle's triweekly continuation from San Antonio to Los Angeles, with travel time between the termini taking approximately 51 hours. Amtrak claims the route as one of its most scenic, with views of the upper Colorado River valley in the Rocky Mountains, and the Sierra Nevada. The modern train is the second iteration of a train named California Zephyr; the original train was privately operated and ran on a different route through Nevada and California.
During fiscal year 2022, the California Zephyr carried 290,423 passengers, an increase of 57.3% over FY2021, but down from its pre-COVID-19 pandemic ridership of 410,844 in FY2019. The train had a total revenue of $51,950,998 in FY2016, the last year that route-specific revenue data was given.
History
Previous service
Prior to the 1971 creation of Amtrak, three competing trains ran between Chicago and the East Bay, with bus connections to San Francisco: The California Zephyr was operated by the Chicago, Burlington and Quincy Railroad (CB&Q), Denver and Rio Grande Western Railroad (D&RGW), and Western Pacific Railroad (WP). It operated between Chicago and Oakland – along what is today called the Central Corridor and Feather River Route – via Omaha, Denver, Salt Lake City and Oroville. Amid much fanfare and publicity, the California Zephyr was inaugurated on March 20, 1949. It was discontinued in March 1970 – the only one of the three trains not still operating when Amtrak took over service. The City of San Francisco was operated by the Chicago, Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road), Union Pacific Railroad (UP), and Southern Pacific Railroad (SP). It operated between Chicago and Oakland on the Overland Route via Omaha, Cheyenne, Ogden and Reno. The San Francisco Chief was operated by the Atchison, Topeka and Santa Fe Railway (AT&SF) via the more southerly Southern Transcon. It operated between Chicago and Richmond via Kansas City, Amarillo, and Bakersfield.
Railpax (renamed Amtrak in late April 1971) originally intended to revive the California Zephyr as part its original route network, using the Burlington Northern (ex-CB&Q) east of Denver, the DRG&W between Denver and Ogden, Utah, and the WP west of Ogden. The California Zephyr route would serve more populated areas (including Denver and Salt Lake City) than the Overland Route, would run through rural communities that lacked good highway access, and could attract passengers to its scenic routes.
However, since the WP had shed the last of its money-losing passenger service by terminating the California Zephyr, it was not eligible to participate in Amtrak's formation. On April 12, 1971, the WP refused to cooperate with Railpax, and the SP route between Ogden and Oakland was chosen instead.
On April 26, the D&RGW elected not to join Amtrak. The contract specified that Amtrak could later increase service, and D&RGW feared that would crowd its single-track mainline that competed with the UP's double-track route. The D&RGW chose to operate the Denver–Ogden Rio Grande Zephyr. Amtrak scrambled to piece together a Denver–Cheyenne–Ogden routing on the UP.
Amtrak era
Between the spring of 1971 and the summer of 1972, passengers traveling between Chicago and Oakland would have to travel on two different trains: the Denver Zephyr, which operated daily between Chicago and Denver, and the City of San Francisco, which operated three times a week, between Denver and the San Francisco Bay Area. Eventually, however, after several false starts, Amtrak consolidated the two trains into one, dubbed the San Francisco Zephyr, homage to both the California Zephyr and the San Francisco Chief, between Chicago and Oakland. The Rio Grande continued to operate the Rio Grande Zephyr between Denver and Ogden.