YOSEMITE NATIONAL PARK, Calif. -- Yosemite National Park officials need your help to find a missing hiker.
Hayden Klemenok was last seen backpacking with a group at Upper Chilnualna Fall on Sunday afternoon.
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Park officials say he entered Chilnualna Creek near the trail junction at about 2 pm but hasn't been seen since.
He was last seen wearing a red t-shirt, blue swimming trunks and white sneakers with a tan hat and sunglasses.
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If you see him, contact Yosemite National Park dispatch.