Ask HN: What's the best dog-friendly area near YC?

My cofounder and I are thinking of moving our startup to the bay area. I have a 90lb german shepherd and we live on the edge of a vast wilderness that spans northwest MT and north ID. We hike a few miles every day and its been the best possible lifestyle change for me as a programmer. After living in Boston for a decade, I don't want to subject my pup to suburban/city life without easy access to the outdoors. Does anyone have suggestions for where to look for housing?