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Lake Mead National Recreation Area is a U.S. National Recreation Area located in southeastern Nevada and northwestern Arizona. Operated by the National Park Service, Lake Mead NRA follows the Colorado River corridor from the westernmost boundary of Grand Canyon National Park to just north of the cities of Laughlin, Nevada and Bullhead City, Arizona. It includes all of the eponymous Lake Mead as well as the smaller Lake Mohave – reservoirs on the river created by Hoover Dam and Davis Dam, respectively – and the surrounding desert terrain and wilderness. Formation of Lake Mead began in 1935, less than a year before Hoover Dam was completed.〔 The area surrounding Lake Mead was established as the Boulder Dam Recreation Area in 1936.〔(【引用サイトリンク】publisher=National Park Service )〕 In 1964, the area was expanded to include Lake Mohave and its surrounding area and became the first National Recreation Area to be designated as such by the U.S. Congress.〔(【引用サイトリンク】publisher=National Park Service )〕 Lake Mead NRA features water recreation, including boating, swimming, and fishing, on both lakes as well as the stretches of river between the lakes. It also features hiking trails and views of the surrounding desert landscape. Three of the four desert ecosystems found in the United States — the Mojave Desert, the Great Basin Desert, and the Sonoran Desert — meet in Lake Mead NRA. Tours of Hoover Dam – administered by the U.S. Bureau of Reclamation – are also a major attraction within the recreation area.〔〔(【引用サイトリンク】publisher=Bureau of Reclamation )〕 About of the recreation area are managed separately under the Grand Canyon-Parashant National Monument, established in 2000. Water covers about of the recreation area. ==Wilderness areas== There are currently nine officially designated wilderness areas under the National Wilderness Preservation System lying within Lake Mead National Recreation Area. All are in the Nevada portion. Parts of some of these wildernesses (as indicated) lie outside Lake Mead NRA and are managed by the Bureau of Land Management:〔(【引用サイトリンク】publisher=Wilderness.net )〕 *Black Canyon Wilderness (Nevada) *Bridge Canyon Wilderness *Eldorado Wilderness (partly BLM) *Ireteba Peaks Wilderness (partly BLM) *Jimbilnan Wilderness *Muddy Mountains Wilderness (mostly BLM) *Nellis Wash Wilderness *Pinto Valley Wilderness *Spirit Mountain Wilderness (partly BLM) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lake Mead National Recreation Area」の詳細全文を読む スポンサード リンク
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