The foothill yellow-legged frog (Rana boylii) is a small-sized frog from the genus Rana in the family Ranidae. This species can be found in the Coast Ranges from northern Oregon, through California, and into Baja California, Mexico as well as in the foothills of the Sierra Nevada and southern Cascade Range in California. The foothill yellow-legged frog is a Federal Species of Concern and California State Endangered.