Richmond–Warm Springs line

The Richmond–Warm Springs line (formerly the Richmond–Fremont line) is a Bay Area Rapid Transit (BART) line in the San Francisco Bay Area that runs from Richmond to Warm Springs station in south Fremont. It has 19 stations in Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Hayward, Union City, and Fremont, and is the only BART line that does not go to San Francisco. It shares all of its tracks with other BART lines on weekdays and Saturdays before 7pm.

BART colors this line orange on maps but does not refer to it by color. As BART's only line that does not cross the San Francisco Bay, it is alternatively called the East Bay line or Land line.

The Richmond–Fremont line was the first of BART's five lines to open. Service from MacArthur to Fremont began on September 11, 1972, the first day of BART operation. The line was extended to Richmond on January 29, 1973. Initial fares were $1.00 for Fremont to MacArthur and $1.10 for Fremont to Richmond. The line was extended to Warm Springs/South Fremont station on March 25, 2017 as part of BART's Warm Springs extension project and the first phase of the Silicon Valley extension project; service to Warm Springs is limited to weeknights after 6pm and weekends.

This line will be extended to Berryessa station in San Jose later in 2017. Current plans call for the line to be eventually extended to Santa Clara station.