The hind legs of the Oregon spotted frog are short relative to its body length and their groin tends to be uniformly gray but can sometimes be faintly mottled with gray markings and red-orange flecks. Their hind feet are fully webbed and the webbing normally extends onto the last segment of the longest toe.
The hind legs of the Oregon spotted frog exhibit a distinctive characteristic in that they are proportionally short compared to its overall body length, with a groin area that is typically gray but can occasionally display subtle gray markings and reddish-orange spots. The hind feet are fully webbed and the webbing usually extends onto the final toe.