A search is underway on the Pleasanton Ridge for 37-year-old Philip Kreycik, who was reported missing by his wife Saturday after he failed to return from a run in the hills near the Moller Ranch staging area in Pleasanton.

Kreycik parked his vehicle at the staging area around 11 a.m. Saturday and told his wife he was going for a one-hour run in the East Bay Regional Park.

Kreycik is described as a white male with a thin build, brown hair, brown eyes and

presumed to be wearing running attire.

Kreycik is an avid long-distance runner with no known health conditions.

An extensive search is being conducted in the surrounding area. Personnel from the Pleasanton Police Department, East Bay Regional Park Police, Alameda County Sheriff’s Department, and the California Highway Patrol are utilizing drones, fixed wing aircraft, off-road vehicles and search and rescue teams to locate Kreycik.

The East Bay Regional Park system, including the Pleasanton Ridge, remains open for visitors.

Anybody with information about Kreycik’s whereabouts is asked to contact the Pleasanton Police Department at 925-931-5100.