Washington

Mount Washington
Elevation	7,795 feet (2,376 metres)
Location	Oregon, USA
Range	Cascade Range
Prominence	2,554 ft (779 m)
Coordinates	44°19′55.65″N, 121°50′18.70″W
Topo map	USGS Mount Washington 44121-C7
Type	Shield volcano
Volcanic arc/belt	Cascade Volcanic Arc
Age of rock	Pleistocene
Last eruption	~670 AD
First ascent	1923 by E. McNeal and party[citation needed]

Mount Washington is a shield volcano in the Cascade Range of Oregon. The mountain dates to the Late Pleistocene. However, it does have a line of basaltic andesite spatter cones on its northeast flank, which are approximately 1,330 years old according to carbon dating. The main peak is a volcanic plug that was heavily eroded by glaciers in the last ice age.^[1]

Climbing Mt Washington is an easy daytrip(3-6 hours to summit), however caution is necessary as the volcanic rock is loose and rotten. The easiest route is via the North Ridge. Access via the Pacific Crest Trail near Big Lake. Hike through 2 miles of forest trail up to the ridge. Stay east of rocks up to summit block. Climb through chimney past leftover rappel slings and scramble up summit block about 100 yds. Class 4 climbing- rope and climbing knowledge preferred.

References

External links

• USGS page about Mount Washington
• Washington, Oregon at Volcano World

• Maps and aerial photos
  • WikiSatellite view at WikiMapia
  • Topographic map from TopoZone
  • Aerial image from TerraServer-USA
  • Surrounding area map from Google Maps
  • Location in the United States from the Census Bureau

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