This is a list of bus routes operated by the San Mateo County Transit District (SamTrans) primarily in San Mateo County of the San Francisco Bay Area, in the state of California.
Notes: †: San Francisco stops restriction applies Northbound (from San Mateo County): SamTrans cannot pick up northbound passengers at San Francisco stops Southbound (to San Mateo County): Passengers boarding in San Francisco may not disembark in San Francisco NB – northbound, SB – southbound Sunday service is run during most holidays.
Route numbering scheme SamTrans route numbering scheme Transit connections Areas served Sequence number — School-oriented routes1 Coastside0 Sequential number assigned to numbered routes1 Serving North County and Coastside2 North County Colma / Daly City 2 Serving South County3 Brisbane / South San Francisco3 Connects to BART and Caltrain4 San Bruno / Millbrae / Burlingame 5 Mid County San Mateo / Foster City / Redwood Shores6 Belmont / San Carlos7 Redwood City8 South County Menlo Park / East Palo Alto / Palo Alto9 Multi-city service
Notes
Express routes SamTrans discontinued its last remaining express route, KX, by merging it into route 398 on August 5, 2018. Since then, the SamTrans board adopted the Express Bus Feasibility Study on December 5, 2018. The agency recommended launching six new express routes, starting with two pilot routes scheduled to begin in summer 2019. One route began service on schedule, but the other began service five years late. The first route, FCX, travels between San Francisco and Foster City along US 101. Route EPX provides service between San Bruno and East Palo Alto.
An early-morning weekday express route with limited trips, separate from the pilot program, was introduced on February 11, 2019. Route 713 provided replacement service for BART between 4:00 am and 5:00 am while seismic retrofit work was performed in the Transbay Tube. It currently runs between the Salesforce Transit Center and Millbrae Intermodal station via SFO Intl. Airport. This route was made a permanent addition.
The first new express route, designated FCX, started service on August 19, 2019. FCX operates two trips in each direction with headways of approximately 30 minutes during peak weekday commute hours, using recent buses that feature onboard Wi-Fi.
The next two express routes began in 2024, one serving between San Francisco/San Bruno and East Palo Alto (EPX). The other, PCX, serves Pacifica while serving stops at bus pads along the CA-1 freeway.
RouteTerminalsAreas ServedNotesLinks713Millbrae Millbrae Intermodal StationSan Francisco Salesforce Transit CenterMillbrae, San Bruno, San FranciscoExpress service. No stops other than Millbrae Intermodal Station, SFO Intl. Airport, and Salesforce Transit Center.Schedule and Route MapFCXFoster CityHillsdale Blvd & Shell BlvdSan Francisco Salesforce Transit CenterFoster City EXpress. Foster City, San Mateo, San FranciscoLimited stops. Operates along Mission Street in San Francisco, serving the Financial District, Salesforce Transit Center and Ferry Building.Schedule and Route Map (PDF)EPXEast Palo Alto East Bayshore Rd & Donohoe StSan Bruno San Bruno BART StationEast Palo Alto EXpress. Redwood City, SFO Intl. Airport, San Bruno, San Francisco, East Palo Alto Serves SFO Airtrain during all times of operation. Operates every 45 minutes until 6:56 pm Northbound & 6:10 pm Southbound in both directions. Operates four trips to Downtown San Francisco only during peak commute periods.San Francisco Salesforce Transit CenterPCXPacificaLinda Mar Park and RideDaly CityDaly City stationPacifica Coastside EXpress. Pacifica, Daly CityReplacing route 118, this route serves limited stops between Linda Mar Park & Ride and Daly City station.
Local bus lines that serve North County These bus lines are SamTrans lines that serve the northern and coastal parts of San Mateo County. These lines are identified with a "1" in the first digit of the three digit line number and designated as serving BART. RouteTerminalsAreas ServedNotesLinks110Daly CityDaly City stationPacificaLinda Mar Park and RideDaly City, PacificaSchedule and Route Map (PDF)112ColmaColma stationPacificaClarendon Rd & Francisco BlvdColma, PacificaSchedule and Route Map (PDF)117PacificaLinda Mar Park and RideHalf Moon BayMiramontes Pt Rd & Moonridge AptsPacifica, Montara, Moss Beach, El Granada, Half Moon BaySchedule and Route Map (PDF)120Daly CityBrunswick St & Templeton AvColmaColma stationDaly City, ColmaFirst trip of the day from Daly City continues to San Francisco International Airport after stopping at Colma station.Schedule and Route Map (PDF)San Francisco International AirportTerminal A121Daly CityPope St & Bellevue AvSan BrunoSkyline CollegeDaly City, Colma, Pacifica, San BrunoSchedule and Route Map (PDF)122San FranciscoStonestownSouth San FranciscoSouth San Francisco stationSan Francisco, Daly City, Colma, South San FranciscoNorthbound route is designated as "122 - Stonestown/SF State," however, SF State University is served before the end of the line.Schedule and Route Map (PDF)130Daly CityDaly City stationSouth San FranciscoAirport Blvd & Linden AvSan Bruno, South San FranciscoSchedule and Route Map (PDF)130BSouth San FranciscoOyster Point138San BrunoSafe Harbor ShelterSouth San FranciscoAirport Blvd & Linden AvSan Bruno, South San Francisco, ColmaSome runs originate from now-defunct route 38, or continue as either route 130 or route 141. Schedule and Route Map (PDF)ColmaColma station141San BrunoSkyline CollegeSouth San FranciscoAirport Blvd & Linden AvSan Bruno, South San FranciscoOperates via San Bruno BART stationSchedule and Route Map (PDF)142San BrunoSenior CenterSan Francisco International AirportRental Car Center AirTrain stationSan Bruno, South San FranciscoOperates via San Bruno BART stationSchedule and Route Map (PDF)
Local bus lines that serve South County These bus lines are SamTrans lines that the central and southern portions of San Mateo County. These lines are identified with a "2" in the first digit of the three digit line number and designated as serving Caltrain. RouteTerminalsAreas ServedNotesLinks250San MateoCollege of San MateoSan MateoSan Mateo Dr & 2nd AveHillsborough, San MateoAlso serves San Mateo station.Schedule and Route Map (PDF)251San MateoHillsdale Shopping CenterFoster CityHillsdale Blvd & Foster City BlvdHillsborough, San Mateo, Foster CityOperates as a counter-clockwise loop route in Foster City.Schedule and Route Map (PDF)260San CarlosSan Carlos stationBelmontCarlmont Village Shopping CenterBelmont, Redwood Shores, San CarlosAlso serves Belmont station.Schedule and Route Map (PDF)270Redwood CityRedwood City stationRedwood CityFlorence St & 17th AvenueRedwood City, AthertonOperates as a counter-clockwise loop route in Redwood City.No Sunday/holiday service.Schedule and Route Map (PDF)276Redwood CityRedwood City stationMenlo Park4100 Bohannon DriveRedwood City, Atherton, Menlo ParkSchedule and Route Map (PDF)278Redwood CityRedwood City stationWoodsideCañada CollegeRedwood City, WoodsideService west of Alameda de Las Pulgas & Woodside operates as a bidirectional loop.AM trips operate the clockwise loop. PM trips operate the counterclockwise loop.Schedule and Route Map (PDF)280Palo AltoPalo Alto stationEast Palo AltoPurdue Av & Fordham StPalo Alto, East Palo AltoSchedule and Route Map (PDF)281Menlo ParkBelle Haven Community Campus/Kelley ParkStanfordStanford OvalMenlo Park, East Palo Alto, Palo AltoAlso serves Palo Alto station and Stanford Shopping Center.Schedule and Route Map (PDF)294Half Moon BayMain St & Poplar StSan MateoHillsdale stationHalf Moon Bay, San MateoSchedule and Route Map (PDF)295San MateoHillsdale stationRedwood CityRedwood City stationSan Mateo, Belmont, San Carlos, Redwood CityAlso serves San Carlos station. One trip deviates to serve Cordilleras Mental Health Facility. Served Menlo Park station until August 11, 2013.Schedule and Route Map (PDF)296Redwood CityRedwood City stationEast Palo AltoEast Bayshore Rd & Donohoe StRedwood City, Menlo Park, East Palo Alto, Palo AltoAlso serves Menlo Park station.Schedule and Route Map (PDF)296OAll Nighter ServicePalo AltoPalo Alto stationService to Palo Alto station operates as an All Nighter filler service before and after Route 397 operations.Schedule and Route Map (PDF)
Local bus routes with multi-city connections These SamTrans bus routes serve multiple areas in San Mateo County. These routes were at one time identified with a "3" in the first digit of the three-digit route number and designated as serving both BART and Caltrain, although the 397 is the only remaining route with the number "3" in the first digit. Route 292 is an exception.
RouteTerminalsAreas ServedNotesLinks292†San FranciscoSalesforce Transit Center San MateoHillsdale Shopping CenterSan Francisco, Daly City, Brisbane, South San Francisco, San Bruno, San Francisco International Airport, Burlingame, San MateoOperates along Mission Street in San Francisco, serving Salesforce Transit Center, Financial District and Ferry Building. Also serves San Francisco International Airport and Millbrae station. Schedule and Route Map (PDF)397†All Nighter ServiceSan FranciscoSalesforce Transit Center Palo AltoPalo Alto stationSan Francisco, Brisbane, South San Francisco, San Francisco International Airport, Millbrae, Burlingame, San Mateo, Belmont, San Carlos, Redwood City, Menlo Park, Palo Alto Operates along Mission Street in San Francisco, serving Salesforce Transit Center, Financial District and Ferry Building. Provides some connections to AC Transit Route 800. Also serves San Francisco International Airport, Millbrae station, Hillsdale station, Belmont station, San Carlos station, Redwood City station and Menlo Park station.Schedule and Route Map (PDF)CSMSan MateoSan Mateo StationSan MateoCollege of San MateoDaly City, South San Francisco, San BrunoCSM is the abbreviation for College of San Mateo.Schedule and Route Map (PDF)ECRDaly City BART StationPalo AltoPalo Alto Transit CenterDaly City, Colma, South San Francisco, San Bruno, Millbrae, Burlingame, San Mateo, Belmont, San Carlos, Redwood City, Atherton, Menlo Park, Palo AltoNamed after El Camino Real. Replaced former routes 390 and 391. ECRO provides service between 1 AM and 5 AM, skipping all BART stations.Schedule and Route Map (PDF)ECROAll Nighter ServiceDaly City Mission St & Wellington AveSan Francisco International AirportTerminal ASchedule and Route Map (PDF)SKYDaly CityDaly City stationDaly CityDaly City stationDaly City, Serramonte Center, South San Francisco, San Bruno, Skyline CollegeSKY is named for Skyline College.Schedule and Route Map (PDF)
School-oriented local bus lines These bus lines are community bus service that mainly serve schools. They have a limited number of runs, typically one in the morning and one in the afternoon. This may vary per route. RouteTerminalsAreas ServedNotesLinks10School Days onlyDaly City BART StationTerra Nova High SchoolPacifica (Afternoon)Daly City, Pacifica Follows Route 110 with no deviations. Originally part of route 110.Linda Mar Park and RidePacifica (Morning)12School Days onlyGateway Drive and Hickey BoulevardPacificaClarendon Road and Francisco BoulevardPacificaDaly City, Pacifica Follows Route 112 with no deviations, terminating at Fairmount Shopping Center (Gateway Drive and Hickey Boulevard) instead of Colma BART. Originally part of route 112.14School Days only Loop service to/from Terra Nova High SchoolPacifica (Morning)Pacifica Clockwise loop service from/to Terra Nova High School in the morning. Terra Nova High School clockwise to Crespi/Fassler in the afternoon.Crespi Drive and Fassler AvenuePacifica (Afternoon)Terra Nova High SchoolPacifica (Afternoon)15School Days onlyMoonridge ApartmentsHalf Moon BayMain and KellyHalf Moon BayHalf Moon Bay Partially revived route 15 from 2004, used to serve Pescadero, San Gregorio, and Half Moon Bay.