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Calaveras Big Trees State Park is a state park of California, USA, preserving two groves of giant sequoia trees. It is located northeast of Arnold, California in the middle elevations of the Sierra Nevada. It has been a major tourist attraction since 1852, when the existence of the trees was first widely reported, and is considered the longest continuously operated tourist facility in California. The area was declared a state park in 1931 and now encompasses in Calaveras and Tuolumne Counties. Over the years other parcels of mixed conifer forests, including the much larger South Calaveras Grove of Giant Sequoias (purchased in 1954 for $2.8 million USD), have been added to the park to bring the total area to about . The North Grove contains about 100 mature giant sequoias; the South Grove, about 1,000. The North Grove included the 'Discovery Tree' noted by Augustus T. Dowd in 1852 and felled in 1853, leaving a giant stump which is the only remainder of the tree. It measured in diameter at its base and was determined by ring count to be 1,244 years old when felled. However, the largest tree was believed to be the Mother of the Forest, which died after bark was stripped from it in 1854. Today only a fire-blackened snag remains. In addition to the popular North Grove, the park also now includes the South Grove, with a hiking trip through a grove of giant sequoias in their natural setting. The South Grove includes the Louis Agassiz tree, tall and in diameter above ground, the largest tree in the Calaveras groves.〔(【引用サイトリンク】 url = http://www.parks.ca.gov/?page_id=1146 )〕 It is named after zoologist Louis Agassiz (1807–1873). Other attractions in the Park include the Stanislaus River, Beaver Creek, the Lava Bluff Trail and Bradley Trail. The park also houses two main campgrounds with a total of 129 campsites, six picnic areas and hundreds of miles of established trails. Other activities include cross-country skiing, evening ranger talks, numerous interpretive programs, environmental educational programs, junior ranger programs, hiking, mountain biking, bird watching and summer school activities for school children. Dogs are welcome in the park on leash in developed areas like picnic sites, campgrounds, roads and fire roads (dirt). Dogs are not allowed on the designated trails, nor in the woods in general. Image:DiscoveryTree1.jpg|Discovery Tree stump and part of the fallen tree Image:Giant sequoia exhibitionism.jpg|Discovery Tree stump, shortly after its discovery Image:GiantStumpCalaverasNorthGrove.jpg|Discovery Tree stump Image:CalaverasBigTrees2.jpg|Human compared to tree height Image:CalaverasTreeTunnel1.jpg|Tunnel in the Pioneer Cabin Tree, cut in the 1880s to compete for attention with Yosemite's Wawona Tree Image:Calaveras tree.jpg|A tree in the North Grove that was harmed by human activity and burned in the 1908 fire == See also == * List of sequoia groves * List of California state parks * Mother of the Forest * Calaveras Big Tree National Forest 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「Calaveras Big Trees State Park」の詳細全文を読む スポンサード リンク
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