I'm also putting a plug for my club's , the tour de foothills (www.tourdefoothills.com), you do some climbing (1/4 way up Mt. Baldy), plus lot of riding thourgh SoCal Surburbia. The route may change this year now that GMR will be open to cars.....)
Other clubs, I like two centurys the Orange County Wheelmen (www.ocw.org) put on.
The Amtrak century goes from Irvine to Sand Diego, the Last half of the ride is along the coast. Once you get to San Diego, you board a commuter train and ride back to Irvine
Ride around the Bear goes from Redlands to Big Bear Lake and back. it has 9,000+ feet of climbing. It tookme about 10 hours, but it was worth it.

