You’re in the right place if you’re looking to have an adventure in Washington state.

Ape Cave Lava Tube is a natural wonder located in Mount St. Helens, Washington. At over two miles long, the Ape Cave Lava Tube is the longest in America. And while the lava cave’s size, structure, and history, make it a popular destination for both locals and tourists, dogs aren’t allowed. If you’re curious to know more, read on to learn what’s in store when you visit this National Volcanic Monument.

The Ape Cave Lava Tubes are on the south side of Mt. St. Helens. You'll need to take Highway 503 to reach them.
Tripadvisor/Ryan S
Between hiking through the caves and exploring the surrounding area, plan to spend at least a day checking out this part of Washington state.
There are two caves within the lava tubes. The lower cave is just under a mile long and the upper cave is approximately one and half miles long.
Tripadvisor/Management
In addition to bringing a jacket, remember to pack a flashlight or headlamp so you can get a close look at the colors and details within the lava caves.
Tripadvisor/Melissa L

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The lava caves are around 2,000 years old. During your visit, have fun imagining that you've been transported to another world.
Tripadvisor/SmartMomfromSeattle
The caves might be a bit slippery, so make sure you're wearing a good pair of hiking shoes, too.
Tripadvisor/Melody H.
As you explore the lava tube, be prepared to duck when you wander through the two caves.
Tripadvisor/Chanathon K
Have your camera with you when you visit Ape Cave Lava Tubes - you won't want to miss capturing shots of the different landscapes.
Tripadvisor/Krystal W

If you’d like more information on the Ape Cave Lava Tubes, visit the United States Department of Agriculture website. 

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Ape Cave, Washington 98616, USA