Diamond Peak (Oregon)

Diamond Peak
Diamond Peak volcano in October 2005, with the smaller Mount Yoran to the right
Highest point
Elevation8,748 ft (2,666 m) NAVD 88[1]
Prominence3,104 ft (946 m)[2]
Coordinates43°31′15″N 122°08′58″W / 43.520696292°N 122.149582933°W / 43.520696292; -122.149582933[1]
Geography
Diamond Peak is located in Oregon
Diamond Peak
Diamond Peak
Parent rangeCascades
Topo mapUSGS Diamond Peak
Geology
Age of rockLess than 100,000 years[5]
Mountain typeShield volcano with a stratocone, stratovolcano[4]
Volcanic arcCascade Volcanic Arc
Last eruptionMore than ~11,000 years ago, but less than 100,000 years ago[6]
Climbing
First ascent1852, John Diamond and William Macy[7]
Easiest routeHike or climb[8]

Diamond Peak is a volcano in Klamath and Lane counties of central Oregon in the United States. It is a shield volcano, though it might also be considered a modest stratocone. Diamond Peak forms part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Oregon to Northern California. Reaching an elevation of 8,748 feet (2,666 m), the mountain is located near Willamette Pass in the Diamond Peak Wilderness within the Deschutes and Willamette national forests. Surrounded by coniferous forest and visible in the skyline from foothills near Eugene, Diamond Peak offers a few climbing routes and can be scrambled. Diamond Peak is one of Oregon's Matterhorns.

The volcano, consisting mostly of basaltic andesite, has relatively steep slopes and an andesitic volcanic cone that contains pyroclastic materials at its core. The mountain has a number of subfeatures including Mount Yoran, Lakeview Mountain, and a number of cinder cones. Diamond Peak was thoroughly eroded by glaciers and has several cirques as a result.

  1. ^ a b "Diamond". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved April 1, 2008.
  2. ^ "Diamond Peak". Peakbagger.com. Retrieved January 14, 2023.
  3. ^ Oregon Road & Recreation Atlas (Map) (Third ed.). Medford, Oregon: Benchmark Maps. 2006. p. 73. ISBN 0-929591-88-7.
  4. ^ D. R. Sherrod; et al. (1983). Geology and mineral resource potential map of the Diamond Peak Wilderness, Lane and Klamath counties, Oregon (Report). USGS. doi:10.3133/ofr83661.
  5. ^ Cite error: The named reference USDA was invoked but never defined (see the help page).
  6. ^ Wood & Kienle 1992, pp. 189–190.
  7. ^ Cite error: The named reference exp was invoked but never defined (see the help page).
  8. ^ Wuerthner 2003, pp. 96–97.