The Coast Starlight is a passenger train operated by Amtrak on the West Coast of the United States. It runs from Seattle, Washington to Los Angeles, California via the San Francisco Bay Area. The train was the first to offer direct service between the two cities. Its name is a combination of two Southern Pacific Railroad trains, the Coast Daylight and the Starlight. The train has operated continuously since Amtrak's formation in 1971. Unique among Amtrak's long-distance trains, the train features a Hi-Level lounge for sleeping car passengers named the "Pacific Parlour Car."
Before the formation of Amtrak, no one passenger train ran the length of the West Coast. The closest equivalent was SP's West Coast, which ran via the San Joaquin Valley from Los Angeles to Portland, with through cars to Seattle via the Great Northern Railway. The SP had the Coast Daylight between Los Angeles and San Francisco and the Cascade between Oakland and Portland. The SP also ran overnight trains between Los Angeles and San Francisco Bay area – the all-sleeping car Lark on the coast route and the mixed coach and Pullman Owl on the San Joaquin Valley line. Service from Portland north to Seattle was provided by the Union Pacific, Northern Pacific Railway or Great Northern Railway. In 1970 the Great Northern and the Northern Pacific were merged into the Burlington Northern Railroad, which continued to provide service. Trains south from Los Angeles to San Diego were the Santa Fe's San Diegans.