Arches National Park is a United States national park located in the northern Colorado Plateau on the Colorado River north of the city of Moab in the U.S. state of Utah. It preserves the world's largest concentration of natural stone arches, which are constantly being created and disappearing through erosion and weathering. Over 2000 arches with openings of at least 3 feet (90 cm) have been recorded in the park area. The ecosystems of the park, which covers more than 300 km², range from the banks of the Colorado River to bare rock and are characterized by the average altitude of about 1500 m above sea level with a desert climate.
The area was designated a National Monument in 1929 and upgraded to a National Park in 1971. It is managed by the National Park Service.
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