# Mount St. Helens

- **Country:** United States
- **Coordinates:** 46.191200, -122.194400
- **Age:** Less than 40,000 years old
- **Topo:** USGS Mount St. Helens
- **Type:** Stratovolcano
- **Range:** Cascade Range
- **Listing:** {{unbulleted list
- **Location:** Location in Washington state
- **Etymology:** Alleyne FitzHerbert, 1st Baron St Helens
- **Formed By:** Subduction zone volcanism
- **Elevation Ft:** 8363
- **First Ascent:** 1853 by Thomas J. Dryer
- **Volcanic Arc:** Cascade Volcanic Arc
- **Easiest Route:** Hike via south slope of volcano (closest area near eruption site)
- **Last Eruption:** 2004–2008
- **Prominence Ft:** 4605
- **Label Position:** right

![Photo of Mount St. Helens](https://upload.wikimedia.org/wikipedia/commons/d/dc/MSH82_st_helens_plume_from_harrys_ridge_05-19-82.jpg)

**Source:** https://en.wikipedia.org/wiki/Mount_St._Helens (Wikipedia, CC BY-SA)