Oakland man missing in Yosemite National Park

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Authorities from Yosemite National Park are searching for a missing 36-year-old Oakland man.

Alan Chow was last seen on February 17, 2018 at the Hetch Hetchy Entrance of the park.

Chow is described as 5'8" - 5'10", 130-150 lbs, with Black hair, Brown eyes, and black frame glasses. He was possibly carrying a blue backpack as seen in photos

Chow's co-workers called Yosemite National Park on Tuesday to say that he did not come back to work as scheduled. Park officials said Chow has a back country permit for three days in the Hetch Hetchy area. 

Three ground crews began searching for Chow by foot and helicopter on Wednesday.

Anyone who may have seen him is asked to call the tip line at  888-653-0009.