In is no surprise, therefore, that Yosemite is quite crowded from June to September. Whoever needs a place to stay inside the valley, should definetely book early. Good news for hikers and climbers: as soon as you leave the direct center of the valley and the famous viewpoints, you'll also leave most people behind you.
This route leads us to the top of the Upper Yosemite Fall, with its 739 m being among the highest waterfalls in the world. This also means a strenuous climb, but the path is broad and there is shade in many places, so you can definetely do this tour on hot summer days.