Came across this guy yesterday taking a dip in my pool. By the time I got the cell phone to take a picture he had climbed out and curled by the pat
It's a speckled king snake about 3' long. They are harmless and I see them every once in awhile. They feed mostly on other snakes and lizards and there is a large lizard population around the patio so I expect he was looking for lunch.
What was surprising is that he crawled into the channel drain and the opening is only 3/4" wide. He had to come out to get around the 90 deg corner then went in again. The end of the drain is open to the yard so he had a good way out.