Northern California: Where to get cider apples

I live in the San Francisco bay area this year I went got apples (you know the whatever kind from an orchard, Jonathan, sweet apples) I am now trying to find apples real cider apples. I did not put in the work to find a place this year but the next apple season I want real tart apples grown specifically for cider. Where do I find these apples in Northern California?

I don’t mind driving to go find them, however I am not going as far as Washington or Oregon.

Try this:

http://sacramento.cbslocal.com/guide/insider-family-guide-to-apple-hill/