Named a World Heritage Site in 1984, Yosemite is internationally recognized for its spectacular granite cliffs, waterfalls, clear streams, Giant Sequoia groves, and biological diversity. Almost 95% of the park is designated wilderness. Although not the first designated national park, Yosemite was central to the development of the national park idea, largely because of the work of people like Galen Clark and John Muir. Yosemite is one of the largest and least fragmented habitat blocks in the Sierra Nevada, and the park supports a diversity of plants and animals. The park has a height ranging from 2,127 to 13,114 feet (648 to 3997 m) and contains five major vegetation zones: Chaparral / oak forest, lower Montane, Upper Montane, subalpine and alpine. Of California's 7,000 plant species occur around 50% in the Sierra Nevada and more than 20% within Yosemite. There is suitable habitat or documentation for more than 160 rare plants in the park, with rare local geologic formations and unique soils characterizing the restricted ranges many of these plants absorb.
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