A memorial service for Megan Mitchell, 34, the daughter of former Portola Valley mayor Kent Mitchell and Jo Ann Mitchell, will be held at noon Saturday, Feb. 20, at the Family Farm on Portola Road, Mr. Mitchell said Thursday.

Ms. Mitchell was found dead Wednesday under a bridge in San Mateo. The San Mateo County Sheriff's Office is calling the incident a suicide, press officer Lt. Ray Lunny said.

Ms. Mitchell, who resided in Belmont, had been suffering from bipolar disease, Mr. Mitchell said in an interview. Her mother and father live in Portola Valley.

Ms. Mitchell had been depressed over "serious health problems" and had told her parents that she was going to go home to Belmont, pick up her medication and a change of clothing, then return to Portola Valley to spend the night, deputies from the San Mateo County Sheriff's Office said.

Deputies discovered Ms. Mitchell's body under the Eugene Doran Bridge on Interstate 280 in San Mateo early Wednesday (Feb. 10) after her parents called in a missing person report.

Acting on a tip from Ms. Mitchell's boyfriend, deputies focused their attention on the area around the bridge and found Ms. Mitchell's vehicle parked on the northbound shoulder of the freeway around 12:10 a.m.

Using flashlights, they found her body after a 30-minute search. Firefighters and a cliff-rescue team recovered her body, deputies said.

The surface of the bridge is approximately 350 feet above the valley floor, deputies said.