I think claravale is good stuff. It's not 100% grass-fed, but it's way better than organic pastures (the other brand you sometimes see at the store.) (They are on pasture when it is ecologically viable to do so, and eat fresh grass, hay, and grain. Their website has an interesting discussion of it. for them, it's partly about the taste, and partly about not irrigating)
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Your only other option for raw milk in California is a quasi illegalish herd share. There are some farmers with herdshares in petaluma I think. I've had some of two farmer's, and both were the most amazing milk I've ever tasted, and run price-wise about the same as claravale. They are legally run in that you own part of the cow, and pay the farmer to take care of your share of the cow, and then you get some of "your" milk. I don't know how legal it is. The local WAPF chapter might know of some herd shares.