There's also the brevet series put on by the Cayucos Cycling Club down near San Luis Obispo (apparently an offshoot of the San Luis Obsipo bike club).

Not a hop skip & jump from the Bay Area, but but worth keeping in mind.

http://www.cccbrevets.com/index.html

200K Brevet on Feb 24
300K Brevet on March 24
400K Brevet on April 7
600K Brevet on May 26-27