Baby Bullet

From Transit.Wiki

Baby Bullet is the name given to Caltrain's express service. Baby Bullet trains operate during weekday peak hours only and stop at only a handful of stations along the Peninsula to reduce travel times to about an hour between San Francisco and San Jose. There's no extra charge to ride the Baby Bullet.

Use the trip planner and the timetables for the current train times.

Timetable
Weekday
San Francisco - San Jose