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Diamond Peak

Diamond Peak Volcano, with the smaller Mount Yoran to the right
Elevation 8,744 ft (2,665.2 m) [1]
Prominence 3,104 ft (946.1 m) [2]
Location Klamath / Lane counties, Oregon, USA
Range Cascades
Coordinates 43°31′14.5″N 122°08′58.5″W / 43.520694°N 122.149583°W / 43.520694; -122.149583Coordinates: 43°31′14.5″N 122°08′58.5″W / 43.520694°N 122.149583°W / 43.520694; -122.149583 [1]
Topo map USGS Diamond Peak
Type shield volcano
Age of rock less than 100,000 years [3]
Volcanic arc/belt Cascade Volcanic Arc
Last eruption more than ~11,000 years ago[4]
First ascent 1852 John Diamond & William Macy[5]
Easiest route hike[6]

Diamond Peak is a shield volcano in south west Oregon and is part of the Cascade Range. The mountain is located near Willamette Pass in the Diamond Peak Wilderness within the Willamette National Forest.

Composed of 15 cubic kilometres (3.6 cu mi)[4] of basaltic andesite, the volcano is older than the last ice age but probably younger than 100,000 years. It first began erupting from its northern summit and then from a new vent a little to the south, which is now the main peak. The mountain has several cirques from glacial erosion. It lies directly on the Cascade Crest and therefore receives a heavy snow pack. Snow fields on the northern side may have been glaciers as recently as 100 years ago.[7]

Diamond Peak was first climbed and named in 1852 by John Diamond, a pioneer from Eugene who hoped to survey a shortcut for the Oregon Trail across the Cascades. Misled by word that the shortcut was complete, some 1500 people with 650 wagons left the usual Oregon Trail route in Idaho and followed Elijah Elliott through the central Oregon desert. The group couldn't decide which of the Cascade peaks was Diamond's landmark and followed sporadic blazes to Emigrant Pass at Summit Lake. In mid-October they abandoned their wagons and a rescue party eventually found them on the Middle Fork Willamette River and led them down to the Willamette Valley where they doubled the population of Lane County.[8]

See also


  1. ^ a b "Diamond". NGS data sheet. U.S. National Geodetic Survey. Retrieved 2008-04-01. 
  2. ^ "Diamond Peak". Retrieved 2008-04-01. 
  3. ^ "Diamond Peak Volcano". Deschutes & Ochoco National Forests. USDA Forest Service. 2003-11-26. Retrieved 2007-05-21. 
  4. ^ a b Wood, Charles A.; Jűrgen Kienle (1993). Volcanoes of North America. Cambridge University Press. pp. 189. ISBN 0-512-43811-X. 
  5. ^ "Diamond Peak". Skiing the Cascade Volcanoes. Retrieved 2008-04-01. 
  6. ^ Wuerthner, George (2003-02). Oregon's Wilderness Areas: The Complete Guide. Westcliffe Publishers. pp. 96–97. ISBN 978-1565794344.,M1. 
  7. ^ "Cascades Volcano Observatory: Diamond Peak". USDA Forest Service. Retrieved 2008-04-01. 
  8. ^ Sullivan, William L. (2002). Thurman, Paula (Ed.). ed. Exploring Oregon's Wild Areas (3rd ed.). The Mountaineers Books. 

External links



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