The water part is fairly wide... Wide enough that most dogs don't seem to care to swim all the way to the other side to escape plus the other side has a super steep climb. I was a little nervous about Cricket running around in that part of the park at first since its only partially fenced but she really would have had to be super determined to escape and with the water and other dogs there there is an awful lot of distractions to keep their focus off getting to the other side of the gully. The "beach" part is pretty narrowish, but the dogs spent most of their time in the water anyhow. Jackson would seriously love this place.