ttrose with the colder weather, snakes will be gone till spring . But regardless I have this habit of always looking were I step or put my hands when in the outdoors . I also had a girl friend that got bit by a rattle snake hiking down Switzers canyon to the water falls, she told me all about her ordeal .
Don't bet on San Diego Co. or SoCal for that matter, that they aren't out year round...I've had close encounters in January at Wister and all winter here.