Most of Yosemite Valley falls within a no-camping zone, so while there are trailheads starting from Yosemite Valley, they all require a hike of at least four miles and a minimum elevation gain of 2,500 feet. Most trails lead to rewarding views from the north or south rim of the Valley, but water can be limited in late summer. This region is the most popular, and most crowded, portion of the park. Tuolumne Meadows and Tioga Road East of Olmsted Point. Trails leaving from Tuolumne Meadows require backpackers to hike at least four miles before camping. This mountainous high country has an abundance of peaks, lakes, creeks, rivers, and waterfalls, but temperatures will be significantly cooler than elsewhere in the park. This region is very popular with backpackers during summer, and is correspondingly busy.