Up the trail, Nevada Fall, a waterfall that is almost twice the height of Vernal Fall, awaits the hiker, although there is no cascade of mist over the trail at that waterfall. Behind Nevada Fall is Liberty Cap, an impressive lump of granite. The Mist Trail then rejoins the John Muir Trail: the hiker can travel in Little Yosemite Valley, or take a side trip to the top of Half Dome, using cables to climb the rock. Permits must be obtained in advance to hike Half Dome, and back country permits are required to stay overnight along the John Muir Trail.