It is light brown or grey in color, with dark grey, dark brown, or reddish-brown blotching down the length of their bodies. They are capable of growing to lengths of 30-40 inches (76.2-101.6 cm). They are easily mistaken for various species of rat snake of the genus Pantherophis, which share habitat, and can have similar markings. Some specimens have their markings faded, to appear almost a solid brown color. Juveniles usually have a brown stripe down the back of their bodies. They have two black spots behind the head and smaller black spots down the back on both sides of the stripe.