And as dramatic and beautiful as is the valley in summer, it can be trying, entirely contrary to John Muir's belief that the park is "a place of rest, a refuge from the roar and dust and weary, nervous, wasting work of the lowlands..." Visit Yosemite at the height of summer and your senses can be assaulted by the crowds, the noise of delivery trucks, the buses, the occasional emergency sirens. All these things challenge you to enjoy the splendor that is the Yosemite Valley. But that's not reason enough to dismiss a summer trek to Yosemite. The park is more than the valley, and the valley can be tamed. If you've never been to the park, definitely plan a stop of at least a day in the valley, but also cast your eyes to the High Sierra with all the beauty and exploration it offers. Hike into the wilderness -- and 95 percent of the park is officially designated wilderness -- and seek the inspiration that fired John Muir's passion for the out-of-doors.

http://www.nationalparkstraveler.com/2010/04/summering-yosemite-national-park-logistics5671


The body betrays and the weather conspires, hopefully, not on the same day.