Half Dome, Yosemite National Park

Half Dome is a granite dome at the eastern end of Yosemite Valley in Yosemite National Park, California. It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half. The granite crest rises more than 4737ft above the valley floor.
The impression from the valley floor that this is a round dome that has lost its northwest half is an illusion. From Washburn Point, Half Dome can be seen as a thin ridge of rock, an arête, that is oriented northeast-southwest, with its southeast side almost as steep as its northwest side except for the very top. Although the trend of this ridge, as well as that of Tenaya Canyon, is probably controlled by master joints, 80 percent of the northwest "half" of the original dome may well still be there.
On March 28, 2009, a large rock slide of 1,500,000ft3 occurred from Ahwiyah Point. The slide happened at 5:25 a.m. and damaged a large area under the dome. No one was injured, but hundreds of trees were knocked down, and a portion of the Mirror Lake trail was buried. The slide registered on seismographs as an earthquake reaching 2.5 on the Richter Scale.
As late as the 1870s, Half Dome was described as "perfectly inaccessible" by Josiah Whitney of the California Geological Survey. The summit was finally conquered by George G. Anderson in October 1875, via a route constructed by drilling and placing iron eyebolts into the smooth granite.
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Half Dome Reviews
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  • Half dome is one of many immense granite chunks or walls around Yosemite Valley which give the valley its unique and amazing character. We could see the face of it clearly as we hiked to Mirror Lake; ...  more »
  • I only had the opportunity to view Half Dome from the valley but it was still most impressive. The unique shape is easy to spot and is definitely "the" most well-known landmark in the park. The huge g...  more »
Google
  • One of the most iconic mountain in Yosemite valley. Head up to get some amazing shots or a find a spot to just sit and enjoy the magnificent view.
  • One of the icons of Yosemite. This rock formation is visible throughout the valley and is world wide renown.
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