Alan Chow was last seen on the morning of Saturday, Feb. 17, at the entrance of Hetch Hetchy Trail at Yosemite National Park in Yosemite, Calif.
He was planning to hike the Hetch Hetchy trail. He failed to check out on Feb. 18.
Alan is 5′ 8″ and weighs 140 lbs., with black hair and brown eyes. He was possibly wearing the blue backpack with gray straps and black framed glasses. The temperatures was since dipped below 0 and snow is expected.
If you have seen Alan, or saw Alan at the park between Feb. 17-19, please call or text National Parks at (888) 653-0009 or submit a tip via this link to National Park Investigative Services.