Road Trip Portland → Mount St. Helens – Spirit Lake, 1980 Crater
Portland
Mount St. Helens
120
km
2h
drive
Summer
season
The Itinerary
The catastrophic May 18, 1980 eruption of Mount St. Helens blew 400 m off the mountain's summit, released 26 km³ of material and killed 57 people — the worst volcanic disaster in American history. Forty-six years later, Mount St. Helens National Volcanic Monument lets visitors watch ecosystem rebirth in real time.
The Spirit Lake Memorial Highway (SR-504) starts at Castle Rock (I-5) and climbs 84 km to the Johnston Ridge Observatory — just 8 km from the crater. Plunging views of the growing lava dome, Spirit Lake and the "blast zone" where toppled tree trunks still lie flat like toothpicks.
Ape Cave, a 4 km lava tube to explore in the south, is one of America's longest. Coldwater Lake and Loowit Falls offer easier hikes. Open May to October, the site is one of America's most striking living-geology experiences.
The Spirit Lake Memorial Highway (SR-504) starts at Castle Rock (I-5) and climbs 84 km to the Johnston Ridge Observatory — just 8 km from the crater. Plunging views of the growing lava dome, Spirit Lake and the "blast zone" where toppled tree trunks still lie flat like toothpicks.
Ape Cave, a 4 km lava tube to explore in the south, is one of America's longest. Coldwater Lake and Loowit Falls offer easier hikes. Open May to October, the site is one of America's most striking living-geology experiences.
Points of Interest
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✦
Johnston Ridge ObservatoryObservation deck 8 km from crater, exhibits, eruption film.
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Spirit LakeLake nearly destroyed in 1980, floating logs still visible.
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Ape Cave4 km lava tube, longest in continental America.
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Coldwater LakeLake created by the eruption, kayak, easy trail.
Practical info
- Departure Portland
- Destination Mount St. Helens
- Distance 120 km
- Duration 2h
- Category Medium (100–250 km)
- Best season Summer
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