If you are ambitious, you can climb to the top of this rock when it is available to the public (generally from mid-May or early June through Columbus Day weekend in October). You will need a permit to climb the cable section near the top. The dome elevation is 8,842 feet (2,695 meters) and is 4,800 feet (1,600 meters) above the valley floor. Round trip hiking time from the valley floor is about 10 - 14 hours. There are other trails allowing access from areas other than the valley floor.
Half Dome, Yosemite National Park, California 2005