I have hiked known spots in Santa Barbara just outside the city while on vacation near there, and there is alot of pristine habitat. One outing I tried to get to a number of huge sunlit sandstone outcrops in the distance, but the chaparral was extremely difficult to navigate through - it stopped me. I've got to hand it to folks that have found snakes there - it cannot be easy. I tried the stream-side intstead. Didn't see anything but I know they exist there.
I did get access to private land on two occasions in north-west Santa Barbara county, unfortunately at not the best time of year to see snakes, but I went ahead anyway to get familiar with the habitat. Easier habitat to walk in, mainly because of the fire roads that allow a hiker to get to the areas you want to get to much quicker. I found many burrows and lizards under flat sandstone at various spots. I also found fresh big cat tracks on a fire road that went through an area flanked by low sandstone outcrops. Erie feeling being there and knowing the cat had been there, especially since I was alone. I found myself looking over my shoulder constantly after that, and it kept me from going off trail to the giant outcrops in the distance. A few zonata specimens have been found in a campground a few miles from this spot. Again, I really admire anyone who knows how to hunt these areas.
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Mark