I have a friend who lives in a subdivision right on the edge of Lake Elsinore. The hills are her backyard. She and hubby came up to spend the weekend with us and after they got home she sent me a pic of a rattlesnake curled up right by their front door. Apparently they went in and out unloading the car before noticing it. I told her I’d be moving. Lol
I've lived in Colorado where rattlesnakes are plentiful. I've also lived in Arizona where there are lots of creatures you have to be aware of in addition to rattlesnakes.
It wasn't until my move to Louisiana that I had my first mishap with any of them. I got bit by a baby copperhead that had curled up inside a hollowed out decorative edging block like you put around trees etc. I can tell you that they are not only painful, like a bee sting times 10, but expensive experiences.