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Mount Saint Helens topographic map
Click on the map to display elevation.
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Mount Saint Helens
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, triggered by a magnitude 5.1 earthquake, caused a lateral eruption that reduced the elevation of the mountain's summit from 9,677 ft (2,950 m) to 8,363 ft (2,549 m), leaving a 1 mile (1.6 km) wide horseshoe-shaped crater. The debris avalanche was 0.6 cubic miles (2.5 km3) in volume. The 1980 eruption disrupted terrestrial ecosystems near the volcano. By contrast, aquatic ecosystems in the area greatly benefited from the amounts of ash, allowing life to multiply rapidly. Six years after the eruption, most lakes in the area had returned to their normal state.
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About this map
Name: Mount Saint Helens topographic map, elevation, terrain.
Average elevation: 6,877 ft
Minimum elevation: 5,052 ft
Maximum elevation: 8,310 ft
Skamania County trails, hiking, mountain biking, running and outdoor activities
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Other topographic maps
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Gifford Pinchot National Forest
United States > Washington > Skamania County
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…
Average elevation: 2,523 ft
Spirit Lake
United States > Washington > Skamania County
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…
Average elevation: 3,753 ft
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