Ape Cave (Mt. St. Helens)

About the Attraction

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A visit to Ape Cave at Mt. St. Helens offers a unique underground adventure through one of North America's longest lava tubes. Here’s what to expect:

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• Fascinating Geology: Explore a 2.5-mile-long lava tube formed by a volcanic eruption nearly 2,000 years ago, making it the third longest in North America.
• Immersive Exploration: Descend a stairwell into the cave and choose between the easier lower cave or the more challenging upper cave, which features rough lava rock piles and requires some scrambling.
• Chilly, Mysterious Atmosphere: The cave remains a constant 42°F (5.6°C) year-round, so warm clothing and sturdy shoes are essential, even in summer.
• Essential Preparation: Bring at least two reliable light sources per person, as the cave is pitch-black and cell phone lights are not sufficient.
• Memorable Experience: Walking through the dark, spacious tunnels is both awe-inspiring and accessible for most visitors, with the lower cave suitable for families and the upper cave offering adventure for the more daring.

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Ape Cave is a must-see for those seeking a blend of natural wonder, adventure, and a glimpse into the volcanic history of the Pacific Northwest.