San Mateo County Transit District (SamTrans) 1250 San Carlos Ave. San Mateo County Transit District, San Carlos, California 94070 SamTrans provides fixed bus route and paratransit services for the people of San Mateo County. Loading... No Records Found Sorry, no records were found. Please adjust your search criteria and try again. Maps failed to load Sorry, unable to load the Maps API. Share this:PrintEmailNextdoorTwitterFacebookLinkedIn