The big cat was seen at about 8:20 p.m. in the vicinity of Albion Avenue and Olive Hill Lane.
Residents are advised not to approach mountain lions, and should avoid hiking or jogging at dawn, dusk, and night, hen the animals are most active.
If a mountain lion is encountered, emergency officials advise residents to try to appear large and make noise.
More information about mountain lions can be found at www.keepmewild.org.