Cartes topographiques Skamania County

Altitude moyenne : 1 273 m

Altitude moyenne : 93 m

Altitude moyenne : 381 m

Altitude moyenne : 395 m

Altitude moyenne : 646 m

Altitude moyenne : 1 099 m

Altitude moyenne : 1 099 m

Altitude moyenne : 70 m

Gifford Pinchot National Forest is located in a mountainous region approximately between Mount St. Helens to the west, Mount Adams to the east, Mount Rainier National Park to the north, and the Columbia River to the south. This region of Southwest Washington is noted for its complex topography and volcanic…

Altitude moyenne : 769 m

Altitude moyenne : 648 m

Prior to 1980, Spirit Lake consisted of two arms that occupied what had been the valleys of the North Fork Toutle River and a tributary. About 4,000 years ago, these valleys were blocked by lahars and pyroclastic flow deposits from Mount St. Helens to form the pre-1980 Spirit Lake. The longest branch of Spirit…

Altitude moyenne : 1 144 m

Altitude moyenne : 75 m

The Mount St. Helens major eruption of May 18, 1980 remains the deadliest and most economically destructive volcanic event in U.S. history. Fifty-seven people were killed; 200 homes, 47 bridges, 15 miles (24 km) of railways, and 185 miles (298 km) of highway were destroyed. A massive debris avalanche,…

Altitude moyenne : 2 096 m

Altitude moyenne : 254 m