Gerald Derrickson

Gerald Derrickson, 38, has been missing on South Sister since Sept. 10, 2016, deputies said.

(Deschutes County Sheriff's Office)

A hiker who went missing on South Sister this weekend was found alive on Monday morning, the Deschutes County Sheriff's Office said.

Gerald Derrickson, 38, was found about one and a half miles away from Devil's Lake Trailhead by a pair of trail runners who recognized him from flyers posted by search and rescue teams.

Derrickson was cold and thirsty, but otherwise in good health, sheriff's office officials said in a news release. The runners gave him a sweatshirt and water and guided him back to the Devil's Lake Trailhead.

Derrickson summited the 10,358-foot mountain around 6 p.m. Saturday, officials said previously in a news release. Derrickson split up with his hiking partner on his way up the mountain and didn't make it back to the trailhead, the agency said.

Search and rescue teams began looking for Derrickson on Sunday and resumed the search on Monday.

Derrickson told search and rescue teams that he got lost after he mistakenly walked off the South Sisters climber's trail and into the Three Sisters Wilderness and Wickiup Plains area. He was eventually able to get back to the Wickiup Plains trail, officials said.

Derrickson got lost because he did not have a flashlight or a GPS device, officials said.

He was reunited with his family on Monday.

-- Samantha Matsumoto

smatsumoto@oregonian.com

@SMatsumoto55

Oregonian/OregonLive staff reporter Jim Ryan contributed to this report.