Russian River Brewing Company is pretty noteworthy. It's got like a top 10-15 rated beer in the world - Pliny the Younger. However they wont be selling it in October as they only sell it for a limited time usually between like Feb-April or something like that. And you're really limited in quantity to buy and have to wait in a long *** line usually... But theres Pliny the Elder (37th), Supplication (97th), Beatification (116th), Consecration (196th).
Henhouse and Lagunitas are right next door too, both of which are great.
In and around Berkeley you can try Fieldwork (might have 1 in napa too tbh) and Cellarmaker, which are supposed to be good. Ghost Town too which I think is in Oakland.