Probably just a teenager. I've seen them on the road and other places, just not immediately around our house.

Alan swept the one headed for the garage into the plants along our driveway. Then, he called the Fire Dept (they come and take your snakes away) but by the time they got here, the snake was gone. They told Alan that next time, he should kill it. Well, we really don't want to upset the balance of nature like that.

About a day later, the cleaning lady was walking through the front gate and a snake rattled at her then disappeared. We never did find it. That time, we WERE going to kill it. Just what we need, our cleaning lady getting bit by a rattlesnake. By the time the lawsuit would be over, she would probably own the house! (just kdding).