Authorities said they found no new leads Sunday after an eighth day of searching for Philip Kreycik, who has been missing since July 10.
The 37-year-old Berkeley man's wife reported him missing that same afternoon after he failed to return home from a planned one-hour run in the hills near the Moller Ranch staging area of Pleasanton Ridge Regional Park, where he was last seen about 10:45 a.m., according to police.
Sunday's search found no new traces of Kreycik, according to an account by Sgt. Ray Kelly of the Alameda County Sheriff's Office issued in a news release Sunday night.
"Like the community, we are frustrated and perplexed that this massive effort has yielded no results," said Kelly. "We feel we should have found Philip by now."
Sunday's search involved the largest effort thus far, including 169 professional searchers and support staff following up on 72 hours' worth of tips and leads, Kelly said. The search included rechecking areas searched before that had limited access, such as deep ravines and steep terrain that searchers needed ropes to access.
Kelly said a separate search has been conducted by volunteers on a community search team. The combined efforts have invested thousands of search hours, he said.
"Philip is still missing and we want to find him," Kelly said. "If you know anything or have any information, please contact the Pleasanton Police Department."
Anybody with information about this case is asked to contact the Pleasanton Police Department at 925-931-5100.
In addition to the Alameda County Sheriff's Office and the Pleasanton Police Department, the agencies that have been involved in the search include East Bay Regional Park District, Marin County, Contra Costa County Office of the Sheriff, California Explorer Search & Rescue, Napa County Sheriff's Office, San Mateo County Sheriff's Office, Santa Clara County Sheriff's Office, Placer County Sheriff's Office, Solano County Sheriff's Office, Sonoma County Sheriff's Office, Bay Area Mountain Rescue, Livermore-Pleasanton Fire Department and Community Emergency Response Team.