Mount St. Helens National Volcanic Monument

Introduction

Mount St Helens trails

© Utrecht

Mount St. Helens is best known for its catastrophic eruption on May 18, 1980, which caused 57 deaths and many homes, roads, bridges and railroads were destroyed. This volcanic event also caused the summit to shrink by no less than 400 metres. After that eruption, the summit has been replaced by a 1,500-metre-wide volcanic crater. The mountain is located between the cities of Seattle and Portland. Mount St. Helens is located on the Cascade Range (of which Mount Rainier at 4,392 metres is the highest), which is part of the Pacific Ring of Fire - the most volcanic active part of the world. The volcano is well known for its ash explosions and pyroclastic flows.

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