The wild animal was seen feeding at about 11 p.m. in the vicinity of Oak Knoll Drive near Canyon Lane in the Emerald Lake neighborhood near Redwood City, the same streets where a wildcat was spotted two weeks ago.
As recently as Wednesday night, a mountain lion was spotted in the same area near the 3800 block of Hamilton Way.
Residents are advised not to approach mountain lions, to avoid hiking or jogging when the cats are most active - at dawn, dusk and night - and to keep a close watch on small children.
Mountain lions generally try to avoid confrontation, but residents who encounter the animal should not flee, but rather face the animal, make noise and try to appear larger with arm waving.
More information about mountain lions is available at www.keepmewild.org.