Within Yosemite there is a cavernous granite dome called Half Dome, and generally it is extremely difficult to get a permit to hike to the top of this dome. If you are on a long-distance hike, however, obtaining permits can be a little easier, which is why a side trip to the Half Dome is highly recommended if you happen to be trekking the John Muir Trail. Photo by Travis Burke
"The road goes ever on and on, Down from the door where it began, Now far ahead the Road has gone, And I must follow, if I can, Pursuing it with eager feet, Until it joins some larger way Where many paths and errands meet. And whither then? I cannot say."