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Mount St. Helens National Volcanic Monument, Castle Rock, WA

Photo: Reywas92, CC BY-SA 4.0, via Wikimedia Commons. Cropped and resized.

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Mount St. Helens National Volcanic Monument

Drive into the volcano's blast zone, hike past crater views and walk through a 2.5-mile lava tube.

State Route 504 (Spirit Lake Hwy), east of Castle Rock · Castle Rock, WA

About Mount St. Helens National Volcanic Monument

The Forest Service manages 110,000 acres around the volcano, set aside as a monument in 1982. On the west side, State Route 504 runs into the blast zone to the Science and Learning Center at Coldwater, Coldwater Lake and the Hummocks Trail. The south side has Ape Cave, a lava tube 2.5 miles long, plus Lava Canyon, and the east side roads reach Windy Ridge and views of Spirit Lake. Johnston Ridge Observatory is closed after a 2023 landslide cut the highway.

  • #volcano
  • #national monument
  • #hiking
  • #lava tube
  • #scenic drive

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What's around here?

The closest stops to Mount St. Helens National Volcanic Monument, ordered by straight-line distance. A few more like it, plus some different kinds of fun so you can build a full day.

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