Blue Line (BART)

Blue Line
Pleasanton-bound train at Civic Center station in January 2026
Overview
Owner	San Francisco Bay Area Rapid Transit District
Locale	Tri-Valley, East Bay, San Francisco Peninsula
Termini	Dublin/​Pleasanton Daly City
Stations	18
Service
Type	Rapid transit
System	Bay Area Rapid Transit
History
Opened	May 10, 1997 (1997-05-10)
Technical
Line length	35.7 mi (57.5 km)
Track gauge	5 ft 6 in (1,676 mm)
Electrification	Third rail, 1 kV DC
Operating speed	70 mph (110 km/h)
Route map Blue Line highlighted in blue Valley Link proposed Dublin/ Pleasanton Iron Horse Regional Trail I-680 West Dublin/​Pleasanton San Leandro Hills Castro Valley I-238 / I-580 to Berryessa/​North San José Bay Fair San Leandro SR 112 / SR 61 to OAK Coliseum Fruitvale Lake Merritt to Richmond to Antioch, to Richmond I-880 West Oakland Amtrak Transbay Tube Alameda County San Francisco I-80 Bay Bridge Embarcadero Montgomery Street Union Square/ Market Street Powell Street Civic Center/​UN Plaza 16th Street Mission 24th Street Mission Glen Park | San Jose/ Glen Park I-280 Balboa Park San Jose and Geneva San Francisco San Mateo County Daly City to SFO/Millbrae All stations are accessible

The Blue Line is a Bay Area Rapid Transit (BART) line in the San Francisco Bay Area that runs between Dublin/Pleasanton station and Daly City station. It has 18 stations in Dublin, Pleasanton, Castro Valley, San Leandro, Oakland, San Francisco, and Daly City.

The Blue Line shares much of its track with other BART services. The eastern segment which is unique to it is located in the median of Interstate 580, as are its three unique stations of Castro Valley, West Dublin/Pleasanton, and Dublin/Pleasanton.