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The City of Rocks National Reserve, also known as the Silent City of Rocks, is a United States National Reserve and state park lying north of the south central Idaho border with Utah. It is widely known for its excellent rock climbing and rock formations. The rock spires in the City of Rocks and adjacent Castle Rocks State Park are largely composed of granitic rock of the Oligocene Almo pluton and Archean Green Creek Complex. The City of Rocks is a popular rock climbing area, with over 1,000〔http://www.rakkup.com/guidebooks/city-of-rocks-climbing/〕 traditional and bolt-protected routes. In the 1980s, it was home to some of the most difficult routes in the USA, mostly developed by Idaho climber Tony Yaniro. Climbers in the region refer to the area as simply 'The City'. California Trail wagon trains of the 1840s and 1850s left the Raft River valley and traveled through the area and over Granite Pass into Nevada. Names or initials of emigrants written in axle grease are still visible on Register Rock. Ruts from wagon wheels also can be seen in some of the rocks. ==History== In 1849, an emigrant party with James Wilkins "encamped at the city of the rocks" on the California Trail just north of the Great Salt Lake Desert. Signatures in axle grease on rock faces can be seen today. One emigrant saw the distant rocks in August like "water thrown up into the air from numerous artificial hydrants." Beginning in 1843, City of Rocks was a landmark for emigrants on the California Trail and Salt Lake Alternate Trail〔 :a. :b. 〕 and later on freight routes and the Kelton, Utah to Boise, Idaho stage route. The area's historical and geological values, scenery, and opportunities for recreation led to its designation as City of Rocks National Reserve in 1988. This unit of the National Park System is managed cooperatively by the National Park Service and the Idaho Department of Parks and Recreation. 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「City of Rocks National Reserve」の詳細全文を読む スポンサード リンク
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