Hey Luis - there is a San Bruno BART station that will take you directly to San Francisco, very easy! BART (Bay Area Rapid Transit) is a train system that runs through San Francisco and surrounding areas.
Léa B.
@LEABF法國普羅旺斯-阿爾卑斯-蔚藍海岸大區马赛
Not hard at all :)
There is also a caltrain station that will take you from San Bruno to the SF 22nd Street station or downtown at 4th St and King.
Thomas R.
@SURFERHOMBRE美國加利福尼亞州帕羅奧多
HOP on BArt, there in 20 minutes, lemon squezzy.... !!