"I'm exhausting all possibilities and that's why so many people are out here today," said Kacey Wilkins, Ahonen's friend.

Ahonen's car was found abandoned along highway 6 near Clear Creek about a week earlier. Authorities said all her belongings were still in the car.

"I'm thinking she probably went for a hike because everything was found under her seat. So it seemed like it was planned," said Rebecca Shands, Ahonen's work friend.

Volunteers were looking for clothing, or any sign of Ahonen along the Mayhem Gulch Trail. Many were friends, but some were complete strangers.

"Everyone's here to help find Amy and hopefully bring her home," said Casey Miller, Shands' girlfriend.

Family and friends were planning a fundraiser at Smokin Joe's Bar and Grill in Wheat Ridge on Sunday at 4 p.m. They planned to use any money raised to help search and rescue groups.