Friends and relatives of missing Sacramento man Jason Kyles, 34, spent Wednesday knocking on doors in Oakmont near Annadel State Park.
On the fifth day of searching, searchers branched out from the park boundaries, believing Kyles may have gone onto private property and may be hiding or hurt, said his mother, Jean Kyles of Sacramento.
The search received a boost Tuesday afternoon when searchers found signs of someone having sat on the ground off a trail near Oakmont, in eastern Santa Rosa.
There were a few footprints, a handprint and an indentation from someone who was seated, Sonoma County Sheriff's Lt. Brett Sackett said.
"It could be from anybody, but it was enough to make us want to track that down," he said.
Kyles, a landscape contractor, disappeared Friday. He was last seen in the park Saturday, naked and chanting. His pickup was just outside the huge park's eastern border, on Lawndale Road.
He had suffered from depression and family members feared increasing mental health issues. "He spiraled after he stopped taking his medical marijuana," his mother said.
Kyles disappeared from Sacramento on Friday. He left a note saying he was headed to New York.
Sonoma County sheriff's officials have searched since Saturday, with help from search and rescue workers from several counties. About 80 people searched Wednesday, including 30 friends and family members.
Kyles was last seen Saturday evening in the park by a bike rider, who said the man had been chanting and naked. Kyles' mother said he'd studied Buddhism in recent years.
He is described as 6-foot-6, 185 pounds, with sandy brown hair and blue eyes. Anyone with information is asked to contact deputies at 565-2650.