Update: Alan Chow, the hiker missing in Yosemite National Park since Tuesday, February 20, has been found safe today. Chow, who was backpacking alone, was spotted from a National Park Service helicopter around Noon today above Wapama Fall in the Hetch Hetchy area after an extensive search the past several days. . He was transported to the Hetch Hetchy Ranger Station where he is doing well. Chow sustained minor injuries and has been reunited with family members 

During the last several days, Chow stayed in his tent and was able to stay hydrated and had an adequate food supply. His preparedness and ability to make good decisions were key to his rescue and good health.

Yosemite National Park would like to thank the California Highway Patrol, Bay Area Mountain Rescue, California Office of Emergency Services, Marin County Search and Rescue, Tuolumne County Sheriffs Office, El Dorado County Sheriffs Office, Contra Costa County Search and Rescue, Southern California Winter Ski team,and YoDogs (search dogs). 

February 23, 2018 - Yosemite National Parks relays the following: We are pleased to report that Alan Chow missing in Yosemite National Park has been located in good condition .

Thank you to all who provided tips to help investigators & searchers find the missing hiker. He is being reunited with his family.

Earlier Information:

Yosemite National Park reports a missing person in the park. 

Alan Chow was last seen at Hetch Hetchy entrance on February 17, 2018.

If you have information that could help locate him OR if you were in the area of Hetch Hetchy between February 17–20, please call or text 888/653-0009 or here
Source: NPS