Its range extends south to southern Arizona and Baja California. The colour varies from bright green to bronze to brown, as well as shades in between. These frogs can change the colour of their skin depending on the temperature and humidity. A dark eye stripe runs from the tip of the nose to the shoulder. The tip of each toe has a round, sticky toe-pad.
Small webs are present between the toes of the hind feet.
The belly is white and unmarked. The skin on the back is smooth and there are no folds or ridges. The skin on the belly is granular and there is a fold of skin across the breast between the front legs. Pacific treefrogs are found in a variety of habitats from pristine mountainous areas to farmland. Adult treefrogs move to shallow pools and ponds to breed in early spring but will wander away into the woods to forage among low bushes and trees for insects.