Quote Originally Posted by msincredible View Post
Don't forget you can take BART out of Berkeley if you want to explore other regions. There are limitations on bicycles on BART in San Francisco during commute hours on weekdays, but otherwise there should be no issues.
BART will get you to plenty of places. Just don't:
take your bike on the first car of any train.
primary direction on the SF lines (to SF in the morning, from in the evening)
don't take your bike on the escalator, use elevator or stairs

http://bicycling.511.org