I believe this is a western ratsnake only because I have seen other ratsnakes in this area. It was sitting in tall grass next to a large pond. By the markings could it be a cottonmouth? The head is somewhat visible in the center of the first photo.
Location data is approximate. Observation was shared with me by a friend, who took the photo during a run along Cypress Creek. Speckled kingsnake is predating an eastern copperhead.