Yosemite National Park encompasses nearly 1,200 square miles of California's Sierra Nevada Mountains. The Park was one of the first wilderness parks established in the United States and ranges in altitude from 2,000 feet to more than 13,000 feet above sea level. Yosemite National Park has a variety of terrain, from picturesque valleys with granite cliffs and spectacular waterfalls to giant sequoia trees and expansive wilderness areas.