Volunteers fanned out in Santa Clara Saturday in another search for missing Morgan Hill teen Sierra LaMar.

Peggy Thompson of the Santa Clara County Sheriff's Office sloshed through Coyote Creek trying to catch a scent, hoping to turn up new clues in the search for LaMar.

"We've had a lot of poison oak, ticks," Thompson said. "They've seen three rattlesnakes already today."

They joined more than 100 search and rescue team members from around the Bay Area.

Their mission was to hit hard to reach areas like hillsides and rock formations between Morgan Hill and Gilroy.

"We have searched in past, but didn't focus too much on areas outside the flatlands," said Sgt. Jose Cardoza, of Santa Clara County Sheriff's Office.

At the volunteer center, more than 80 first timers joined many more returning volunteers.

"I'm a parent myself and I think this is every parent's worst nightmare," said first time volunteer Leslie Garcia.

That weekend marked the beginning of week six in the search for LaMar. For her father, Steve LaMar, panic has started to set in.

"I can't believe it's been that much harder," he said. "And then every day just gets just gets harder."