August 02, 2025 4:00pm - 11:00pm
Eruption Hike with a Geologist August 2 2025
WHEN: August 02, 2025 4:00pm - 11:00pm
WHERE: Hummocks Trailhead
DURATION: 7-8 hours, depending on conditions
DISTANCE: 7.5 - 9 miles
GUIDE TEAM: Professional geologist, two professional guides and two certified volunteer mountain stewards, all with extensive knowledge of Mount St. Helens
MINIMUM AGE: 8. If your hiker is younger, contact us to discuss.
COST: $150/person
PERMITS: MSHI provides all permits
MAXIMUM GROUP SIZE 12
Special Eruption Hike with a Geologist!
The Eruption Hike will begin amidst incredible hummocks deposited on May 18, 1980 and as we wind our way through the huge mounds of rocks and debris, we will witness first hand the awesome geological and biological forces that created this landscape 45 years ago. We will emerge from the hummocks and join the Boundary Trail where we will begin our ascent up the scoured and denuded slopes to the ridgeline that separates the blast zone from the standing dead zone. We will visit the Loowit Viewpoint where we will learn about David Johnston and his legacy before we proceed to the Johnston Ridge Observatory (closed) for views of the vast Pumice Plain, volcanic crater and lava domes. Keep your eyes open for meandering elk in the plains below and mountain goats on the cliffs around you.
For detailed information, visit our Eruption Hike program description.
Is the date you want sold out? Add your name to our guided adventures waitlist and we will let you know if space becomes available.