Mount Sinyella

Mount Sinyella is a 5,441-foot-elevation (1,658 meter) summit located in the western end of Grand Canyon National Park, in Coconino County of northern Arizona, USA.[3] It is situated 1.7 mile (2.7 km) north-northwest of Uqualla Point, and four miles (6.4 km) southeast of Boysag Point, at the mouth of Havasu Canyon. As the high point of Sinyella Mesa, it towers 1,200 feet above the mesa, and 3,600 feet above the nearby Colorado River which is 1.5 mile to the northwest.

Mount Sinyella
West aspect
Highest point
Elevation5,441 ft (1,658 m) [1]
Prominence1,193 ft (364 m) [1]
Isolation5.54 mi (8.92 km) [2]
Coordinates36°17′59″N 112°42′22″W [3]
Geography
Mount Sinyella
Location in Arizona
Mount Sinyella
Mount Sinyella (the United States)
LocationGrand Canyon
Coconino County, Arizona, US
Parent rangeCoconino Plateau[1]
Colorado Plateau
Topo mapUSGS Havasu Falls
Geology
Age of rockPermian
Type of rocklimestone, sandstone
Climbing
First ascent1960
Easiest routeclass 5.1 climbing[2]

This isolated butte is an erosional remnant composed of Permian Kaibab Limestone and Coconino Sandstone.[4] This sandstone, which is the third-youngest stratum in the Grand Canyon, was deposited 265 million years ago as sand dunes. According to the Köppen climate classification system, Mount Sinyella is located in a Cold semi-arid climate zone.[5]

History

This butte's name was adopted as Mount Sinyala in 1932 by the U.S. Board on Geographic Names. In 1988, the board officially revised it to the present spelling, Sinyella.[3] It was named by the American conservationist Charles Sheldon for Judge Sinyella (1853–1923), a prominent Havasupai chief who Sheldon hired as a guide to show him the canyon in 1912.[3][6] "It is interesting to go with him [Sinyala], he knows every foot of the country" noted Sheldon.[7] The local native inhabitants called it "Week-eel-eela" which is said to mean "stick sitting up", also their general term for any butte.[8]

The first ascent of the summit was made April 11, 1960, by Don Myers, Mike Sherrick, Jim Wilkerson, and Bill Amborn via the north face.[9] The second ascent was made by Dave Ganci and Jerry Robertson, May 3, 1969.[10]

  • Sinyella Mesa from Boysag Point, with Mt. Sinyella upper left. circa 1951
  • Southwest aspect, circa 1949
  • Mt. Sinyella centered, Sinyella Canyon to left
  • from Boysag Point, circa 1951
  • Mount Sinyella (left) and Paguekwash Point (right) from Kanab Point
  • Mt. Sinyella, east aspect

See also

References
  1. "Mount Sinyella, Arizona". Peakbagger.com. Retrieved 2021-01-23.
  2. "Mount Sinyella - 5,441' AZ". Lists of John. Retrieved 2021-01-23.
  3. "Mount Sinyella". Geographic Names Information System. United States Geological Survey. Retrieved 2021-01-23.
  4. North America, United States, Arizona, Mount Sinyala, Americanalpineclub.org
  5. Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11. ISSN 1027-5606.
  6. United States Board on Geographic Names, Decisions on Geographic Names in the United States, Decision List No. 8804, 1988, page 2.
  7. Karl Jacoby, Crimes Against Nature, 2001, University of California Press, page 267.
  8. Gregory McNamee, Grand Canyon Place Names, 1997, Mountaineers Publisher, ISBN 9780898865332, page 102.
  9. North America, United States, Arizona, Mount Sinyala, Americanalpineclub.org
  10. Grandcanyonhistory.org
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