The victim, identified by the medical examiner's office as Chinese citizen Yuee Yao, was killed in a collision reported at 8:50 p.m. on Christmas Tree Point Road, according to police.
A four-door sedan struck Yao and two other victims, knocking them off the roadway and down a hillside, police said.
A fourth pedestrian managed to jump out of the way but suffered minor injuries, according to police.
All four victims were taken to a hospital, where Yao was pronounced dead. The other three victims are expected to survive, police said.
The sedan fled but was found parked in the Twin Peaks lookout point parking lot and a female suspect was arrested, police said.
Police spokesman Officer Gordon Shyy said the suspect's name was not immediately available this morning.