Yosemite National Park Closes Upper Pines Campground and Camp 4 Due to High Winds and Heavy Snow Causing Risk of Falling Trees Details Last Updated: Sunday, 05 March 2017 12:29 Published: Sunday, 05 March 2017 12:28 Yosemite in WinterSierra Sun Times file photoMarch 5, 2017 - Yosemite National Park reports the Upper Pines Campground and Camp 4 are closed until noon on Monday (March 6) due to high winds and heavy snow causing risk of falling trees.Source: NPS