My wife grew up in that area. I had more than a few encounters up there when we were dating. One time I walked out the door to go home, but a younger cat was curled up on the hood of my truck. It just kinda stretched, yawned, and licked its lips as I yelled at it. I decided to stay a little longer...
We now live in a town south of Sacramento, not quite suburbia, but not quite rural either. I live on the edge of town and have acres of farm land across the street. During the major drought 3 or so years ago, we had a cat that was hanging out fairly regularly. It was never agressive, but it definitely wasn't afraid of people. All the Karens that frequented the walking trail were in a tizzy about it, wanting it gone, but not dead. I assume it eventually left of its own accord, but who knows.