Its range extends from southern British Columbia to northern Baja California, from the coast inward to Montana, Idaho and Nevada. The frog is small, reaching up to 2 inches as an adult. The frog can be identified by a black or dark brown eye stripe along the sides of the head. Body patterns are variable, from stripes or splotches on the back, sides and legs, to almost no markings at all.
Color is also variable from frog to frog, including tan, reddish, gray, brown, black or green.
In my yard, I have found green, tan and gray individuals. The color depth in a particular individual can change from light to dark, influenced by lighting, environment and stress, although actual coloration does not change. The underside of the frog is cream. The Pacific Treefrog is distinguished from other frogs, such as the Cascade Frog by the its long slender legs, toes tipped with round toe pads and limited webbing between toes. The tadpole is blackish, dark brown, or olive brown, usually heavily spotted on top, whitish with bronze or copper sheen below.