FILLMORE, Calif. -

Authorities in Southern California have resumed the search for an Arcadia firefighter who went missing Friday in Los Padres National Forest after chasing his dog during a backpacking trip.

Sheriff's Capt. Rob Davidson says searchers fanned out again early Wednesday, looking in rugged terrain for 34-year-old Michael Herdman.

Herdman was hiking with a friend near the Tar Creek trail when he went running after his dog and disappeared. He was barefoot and wearing only shorts and a T-shirt.

It took the friend two days to hike out of the area and alert authorities.

Rescuers in the air and on horseback are searching the mountains above Fillmore.

Herdman is a firefighter and paramedic with the Arcadia Fire Department.