Mount St. Helens is a volcanic peak in southwest Washington state, in the Cascade range. In 1980, after 123 years of relative dormancy, it became unstable again.   On Ma … y 18, 1980, it erupted violently, blasting tons of rock and ash into the air. The south face of the mountain completely collapsed.
http://www.answers.com/Q/Where_is_Mount_St_Helens_located
Geography of Mount St. Helens. Compared to other volcanoes in the Cascades, Mount St. Helens is fairly young geologically speaking because it formed only 40,000 years ago. Its top cone that was destroyed in the 1980 eruption began forming only 2,200 years ago.
http://geography.about.com/od/hazardsanddisasters/a/mountsthelens.htm
By Amanda Briney. Mount St. Helens is an active volcano located in the United States' Pacific Northwest region. It is about 96 miles (154 km) south of Seattle, Washington and 50 miles (80 km) northeast of Portland, Oregon. Mount St. Helens is a part of the Cascade Mountain Range which runs from northern California through Washington and Oregon and into British Columbia, Canada.
http://geography.about.com/od/hazardsanddisasters/a/mountsthelens.htm
Mount St. Helens remained dormant from its last period of activity in the 1840s and 1850s until March 1980. Several small earthquakes, apparently beginning on March 15, indicated that magma may have begun moving below the volcano.
https://en.wikipedia.org/wiki/1980_eruption_of_Mount_St._Helens
It is believed that this was the largest debris avalanche in history. Following the avalanche, Mount St. Helens eventually erupted and its pyroclastic flow leveled the surrounding forest and any buildings in the area. Over 230 square miles (500 sq km) was within the  blast zone  and was affected by the eruption.
http://geography.about.com/od/hazardsanddisasters/a/mountsthelens.htm
The nearest town to Mount St. Helens is Cougar, Washington, which is around 11 miles (18 km) from the mountain. The rest of the area is surrounded by the Gifford Pinchot National Forest.
http://geography.about.com/od/hazardsanddisasters/a/mountsthelens.htm
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https://quizlet.com/12686902/mt-st-helens-volcano-flash-cards/
George Vancouver named the mountain for British diplomat Alleyne Fitzherbert, 1st Baron St Helens on October 20, 1792, as he and his crew were the first Europeans to see it.
http://www.answers.com/Q/Where_is_Mount_St_Helens_located
1 Mount St. Augustine: Alaska's Active Volcano Some people think that Alaska isn't very interesting, that it is just snow and ice. 2  Well, they would be wrong. 3  Alaska has some of the most amazing views in the world, and it ….
http://www.answers.com/Q/Where_is_Mount_St_Helens_located
On May 18, 1980 a major volcanic eruption occurred at Mount St. Helens, a volcano located in the state of Washington, United States.
https://en.wikipedia.org/wiki/1980_eruption_of_Mount_St._Helens
where mt st helens is located
Mount St. Helens is located in the state of Washington, United States.