Jennifer Blair, a freshman at M-A and a graduate of Hillview Middle School, was last seen in the 400 block of Olive Street at around 4:30 p.m. Wednesday, according to Menlo Park police.
She is considered at risk because of her age, though her absence is considered voluntary and there is no evidence of foul play, according to police.
She is a white girl with long brown hair and hazel eyes, around 5 feet 11 inches tall and weighing around 170 pounds. She was last seen wearing a purple hoodie, a black tank top, blue jeans and sneakers.
Police believe she may have headed to Redwood City, East Palo Alto or San Jose.
Her name is listed in the nationwide Missing and Unidentified Persons Database as a runaway/missing person.
Police are asking anyone with information on this case to call 330-6300 or the anonymous tip line at 330-6395.