This is not a trip for beginners! You need to be able to handle yourself in this environment and be responsible for your own safety. The routes may be rated easy but the nature of the climbs and the rock mean this is not a good place to learn outdoor climbing! Make sure you understand this before you RSVP!
I have never been here but I have been eyeing it in the guide book and it looks amazing. This area near Mt Diablo has some moderate but adventurous looking bolted multipitch climbs. There are also a some mixed sport/trad multipitch routes.
In particular I have my eye on some of the routes at the "Rock of Ages"...
Cave route (5.8, 2 pitches) http://www.mountainproject.com/v/cave-route/105807886
West Face (5.8+, 2 pitches) http://www.mountainproject.com/v/west-face/105872209
There are plenty more around the area.
If we get some trad leaders out with us then there are a load more mixed routes that would open up. If some trad leaders sign up then I will look into adding more spots on the meetup.
There is very little top roping in the area so for this trip you need to be an experienced leader (sport or trad) or a solid lead belay.