The big cat was seen walking along a trail about two miles from the entrance to San Pedro Valley Park, which is on Oddstad Boulevard, officials said.
Residents are advised never to approach a mountain lion, and anyone who encounters a mountain lion should face the animal, make noise, and try to appear larger by waving one's arms and throwing rocks, emergency officials said.
Most mountain lions avoid confrontation.
More information about mountain lions is available at www.keepmewild.org.
