Hiking to the top of Half Dome is one of the most popular hikes in Yosemite National Park. The iconic granite monolith, at 8,842 feet above sea level, attracts people from all over the world who attempt to climb to the summit. Most visitors ascend Half Dome via the cables, which are in place from mid-May through mid-October. https://www.nps.gov/yose/learn/news/hdpermits1.htm