A Yosemite National Park concession employee rides her bike through a desolate Yosemite Valley on Thursday afternoon, July 26, 2018. Park and concession employees and campground hosts remain in Yosemite Valley in Yosemite National Park, California, during the closure. The Valley closed at noon yesterday to all visitors due to poor air quality and firefighting personnel and equipment on the roads because of the Ferguson Fire. The fire is burning near the park's El Portal entrance.
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