Update: The missing climber walked out to a road in the Mount St. Helens area and is in a car headed back to Portland. Original story: A search is underway on Mount St. Helens for a man who went missing during a climbing trip, according to the Skamania County Sheriff’s Office. The man, 38, was part of a group of four hikers with a guide who reached the summit of the Southwest Washington volcano and were on their way back down the mountain when the man went ahead of the others to start packing up their camp.