First Friday - Critical Mass Oakland
6pm - Frank Ogawa Plaza (14th & Broadway) usually ends at Art Murmur.

Second Friday - Berkeley
6pm - Downtown BART Station on Shattuck

Third Friday - San Jose Bike Party
8:30 -12:30pm - rotating location check 24 hrs.in advance... www.sjbikeparty.org

Last Friday - San Francisco
6pm - Embarcadero Plaza

Critical Mass Wiki

BART; CalTrain's Northern most car is a bike car; Amtrak's comfy Capitol Corridor Route has bike racks in several cars and runs between Sacramento & San Jose with stops in San Jose. Santa Clara, Fremont, Hayward, Oakland Coliseum, Jack London Square, Emeryville, Berkeley, Richmond, Martinex and Davis. From San Jose's Diridion Station Amtrak has an express bus with rack for 3 bikes between San Jose & Santa Cruz.