Moro Rock | |
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Highest point | |
Elevation | 6,725 ft (2,050 m) [1] |
Prominence | 245 ft (75 m) [1] |
Coordinates | 36°32′39″N118°45′54″W / 36.54417°N 118.76500°W [2] |
Geography | |
Parent range | Sierra Nevada |
Topo map | USGS Giant Forest |
Geology | |
Rock age | Cretaceous |
Mountain type | Granite dome |
Climbing | |
First ascent | 1861, by Hale Tharp, John Swanson and George Swanson (first recorded ascent by non-natives) |
Easiest route | Hike |
Moro Rock is a granite dome rock formation in Sequoia National Park, California, United States. It is located in the center of the park, at the head of Moro Creek, between Giant Forest and Crescent Meadow. A stairway, designed by the National Park Service and built in 1931, is cut into and poured onto the rock, so that visitors can hike to the top. The view from the rock encompasses much of the Park, including the Great Western Divide. Use of this trail is discouraged during thunderstorms and when it is snowing.
The name "Moro Rock" derives from a blue roan mustang of color the Mexicans call moro, owned by one Mr. Swanson of Three Rivers in the 1860s. [3]
The road to Moro Rock is closed in winter, so visitors need to hike 2 miles to reach the viewpoint. The road is open in summer so the hike is shortened. The 1996 general plan for the park calls for the road to Moro to be closed, and replaced by a shuttle. As of June 2012, the road is open to general traffic only during weekdays; on weekends, the shuttle is running and the road is closed to general traffic. [4] The west face of Moro Rock offers 1,000 vertical feet of cracks and knobs for rock climbing. However, climbing is prohibited during peregrine falcon nesting season on the South and East faces (up to Full Metal Jacket). [5]
Moro Rock is a dome-shaped granite monolith. Common in the Sierra Nevada, these domes form by exfoliation, the spalling or casting off in scales, plates, or sheets of rock layers on otherwise unjointed granite. Outward expansion of the granite results in exfoliations. Expansion results from load relief; when the overburden that once capped the granite has eroded away, the source of compression is removed and the granite slowly expands. Fractures that form during exfoliation tend to cut corners. This ultimately results in rounded dome-like forms. [6]
Moro Rock Stairway | |
Built | 1931 |
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Architect | National Park Service |
NRHP reference No. | 78000283 |
Added to NRHP | December 29, 1978 [7] |
The first stairway leading to the summit of Moro Rock was constructed of wood and installed in 1917. This stairway deteriorated significantly by the late 1920s, and was replaced in 1931 by the present Moro Rock Stairway, built by the Civilian Conservation Corps. [8] Unlike the earlier stairway, the new stairway adopted a design policy of blending with the natural surfaces to the greatest extent possible. The 797-foot-long stairway was designed by National Park Service landscape architect Merel S. Sager and engineer John Diehl, following natural ledges and crevices. It has 400 steps that lead to the summit of Moro Rock. [9] Changes since the original construction have impaired the integrity of the design. [10]
Yosemite National Park is a national park of the United States in California. It is bordered on the southeast by Sierra National Forest and on the northwest by Stanislaus National Forest. The park is managed by the National Park Service and covers 759,620 acres in four counties – centered in Tuolumne and Mariposa, extending north and east to Mono and south to Madera. Designated a World Heritage Site in 1984, Yosemite is internationally recognized for its granite cliffs, waterfalls, clear streams, groves of giant sequoia, lakes, mountains, meadows, glaciers, and biological diversity. Almost 95 percent of the park is designated wilderness. Yosemite is one of the largest and least fragmented habitat blocks in the Sierra Nevada.
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Sequoia National Park is a national park of the United States in the southern Sierra Nevada east of Visalia, California. The park was established on September 25, 1890, and today protects 404,064 acres of forested mountainous terrain. Encompassing a vertical relief of nearly 13,000 feet (4,000 m), the park contains the highest point in the contiguous United States, Mount Whitney, at 14,505 feet (4,421 m) above sea level. The park is south of, and contiguous with, Kings Canyon National Park; both parks are administered by the National Park Service together as Sequoia and Kings Canyon National Parks. UNESCO designated the areas as Sequoia-Kings Canyon Biosphere Reserve in 1976.
Mineral King is a subalpine glacial valley located in the southern part of Sequoia National Park, in the U.S. state of California. The valley lies at the headwaters of the East Fork of the Kaweah River, which rises at the eastern part of the valley and flows northwest. Accessed by a long and narrow winding road, the valley is mostly popular with backpackers and hikers.
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