Mount Adams (Washington)

Aerial View

Mount Adams is a stratovolcano in the Cascade Mountains and Mount Rainier after the second highest mountain in the Pacific Northwest of the United States of America.

Mount Adams is located in the remote wilderness area of the Gifford Pinchot National Forest, about 56 kilometers east of Mount St. Helens volcano.


The first written record of the mountain comes from the year 1805 by members of the Lewis and Clark Expedition. In 1901, the Mountaineers and settlers CE Rusk led some glacier experts, including Harry Reid, on the mountain. Reid conducted the first systematic studies on the mountain and named the largest glacier. Eighty years later, the first official scientific research by the USGS took place.

In the years 1929 and 1931, Wade Dean a piece of land was declared on the summit plateau ( 0.8 square kilometers). He was in search of sulfur springs, built a path and was carrying a drilling rig in the summit area, with whom he made ​​exploratory drilling. After he did not find sufficient sources, the project was discontinued in 1959.


Ice (mostly in the form of glaciers ) covers about 16 square kilometers of the upper summit. The ice is fed by rainfall. The porous rock allows the water as sources outside exit again.

Glaciers cover 2.5 percent of the surface ( during the last ice age, there were about 90 percent). Most of the enormous glaciers, for example, Adams, Klickitat, Lyman, Salmon and White, were taken from the summit.


The volcanism in the area of Mount Adams began in the late Pleistocene, about 940,000 years ago. To date, about two dozen smaller explosive eruptions in the summit area and on side craters can be detected. There are six lava flows, the most powerful 7000-4000 years ago was created and reached a length of some ten kilometers on the flanks at an altitude 2100-2600 meters. The last eruption about 1000 years ago, a tephra deposit, and probably a small lava flow on the eastern flank was. The volcano has a volume of 350 cubic kilometers, making it after Mount Shasta is the second largest stratovolcano in the Cascade Range. The mountain consists of several overlapping caps with a total diameter of 29 kilometers in north-south direction and covers an area of 650 square kilometers. Mount Adams was created by plate tectonics of the Juan de Fuca Ridge, which lies on the coast of the Pacific Northwest region.