Mount Hood

From Wikipedia, the free encyclopedia

This article is about the highest mountain in Oregon. For the mountain in California, see Hood Mountain.

For the community named Mount Hood, see Mount Hood, Oregon.

Mount Hood, called Wy'east by the Multnomah tribe, is a stratovolcano in the Cascade Volcanic Arc of

northern Oregon. It was formed by a subduction zone and rests in the Pacific Northwest region of the United States.

It is located about 50 miles (80 km) east-southeast of Portland, on the border between Clackamas and Hood River

counties.

In addition to being Oregon's highest mountain, it is one of the loftiest mountains in the nation based on

its prominence.The height assigned to Mount Hood's snow-covered peak has varied over its history.

Modern sources point to three different heights: 11,249 feet (3,429 m) based on the 1991

U.S. National Geodetic Survey,^[1] 11,240 feet (3,426 m) based on a 1993 scientific expedition,^[6] and

11,239 feet (3,426 m)^[7] of slightly older origin. The peak is home to twelve glaciers.^[8] It is the highest point

in Oregon and the fourth-highest in the Cascade Range.^[9] Mount Hood is considered the Oregon volcano

most likely to erupt,^[10] though based on its history, an explosive eruption is unlikely. Still, the odds

of an eruption in the next 30 years are estimated at between 3 and 7 percent,^[11] so the USGS characterizes

it as "potentially active", but the mountain is informally considered dormant.^[11]

Mount Hood
Mount Hood reflected in Mirror Lake
Elevation	11,249 ft (3,429 m) NAVD 88^[1]
Prominence	7,706 ft (2,349 m)^[2]
Listing	Ultra U.S. state high point
Location
Mount Hood Clackamas / Hood River counties, Oregon, USA
Range	Cascade Range
Coordinates	45°22′25″N121°41′45″W Coordinates: 45°22′25″N 121°41′45″W^[1]
Topo map	USGS Mount Hood South
Geology
Type	Stratovolcano
Age of rock	More than 500,000 years^[3]
Volcanic arc/belt	Cascade Volcanic Arc
Last eruption	1866^[4]
Climbing
First ascent	1857-07-11 by Henry Pittock, W. Lymen Chittenden, Wilbur Cornell, and the Rev. T.A. Wood^[5]
Easiest route	Rock and glacie

PHOTOGRAPH NATURAL