Washington State
Mount St. Helens
- Location : Skamania Country, Washington,
- Range : Cascade Range
- Coordinates : 46 degree 11' 28"N 122 degree 11'40"W
- Type : Active stratovolcano
- Age of Rock : < 40,000 years
- Volcanic Arc : Cascade Volcanic Arc
- First Ascent : Thomas J. Dryer in 1853
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