If there is one rock formation that represents Yosemite National Park, it is Half Dome. Half Dome is so recognizable that its likeness is used on the California state quarter, on the logo of the Sierra Club, and by many businesses. Half Dome rises 5,000 feet above the valley floor. It is North America's sheerest cliff, being only 7 degrees from true vertical! Half Dome is one of the most photographed rocks in the world. The rock face dominates the eastern end of the valley and can be seen from many vantage points throughout the park.