After comparing the tort to other pics, it must be a Russian tortoise, I think.

There seems to be nobody in my area (east bay area CA) that is missing a Russian tortoise, this climate/environment seems like it could be suitable for one year round in the wild. I wonder if there's a population of them here (probably not).

I'm still amazed that he made it this far with all of the predators and cars around here. Anyways he fell into good hands, looks like I'll be keeping him.