The All Nighter is a night bus service network in the San Francisco Bay Area, California. Portions of the service shadow the rapid transit and commuter rail services of BART and Caltrain, which are the major rail services between San Francisco, the East Bay, the Peninsula, and San Jose. Neither BART nor Caltrain operate owl service due to overnight track maintenance; the All Nighter network helps fill in this service gap. The slogan is, "Now transit stays up as late as you do!"

Bay Area Rapid Transit (BART) is a rapid transit system serving the San Francisco Bay Area in California. BART serves 50 stations along six routes and 131 miles of track, including a 9-mile (14 km) spur line running to Antioch, which uses diesel multiple unit vehicles, and a 3-mile (4.8 km) automated guideway transit line serving San Francisco Bay Oakland International Airport. With an average of 160,400 weekday passengers as of the fourth quarter of 2023 and 48,119,400 annual passengers in 2023, BART is the seventh-busiest rapid transit system in the United States.