The native plants of Yosemite National Park are a significant part of the exquisite beauty and biological diversity of the park. The combination of climate, topography, moisture, and soils influence the distribution of plant communities across an elevation gradient from 1,800 feet (549 m) to over 13,000 feet (3,900 m). Vegetation zones range from scrub and chaparral communities at lower elevations, to subalpine forests and alpine meadows at the higher elevations. There are 800 miles of trails in Yosemite, which provide access for exploring the different vegetation zones.