Explore the Ape Caves

As if erupting volcanoes weren't awesome enough, ancient lava flows also left behind these giant, hollow tubes as they cooled. Spend all day exploring deep underground in this 2.5 mile cave.

To get there, head to the SOUTH side of Mount Saint Helens. You must pass through the town of Cougar to get here, DON'T go to the Johnston Ridge Observatory.

Now, let's explore some caves! It's a short walk from the parking lot to the main cave entrance. Take time to read about how the caves were formed, how they were discovered, and why they're called the 'Ape' Caves. I won't ruin it for you, but it's all interesting!

Descend into the lava tubes first down a stone staircase then a metal one. Make sure you have multiple light sources with fresh batteries. It is extremely dark down there and you don't want to run out of light down there.

The cave is divided into the upper and lower portions. The lower is easier, shorter, and must be done as an out-and-back. Follow the tube as it wiggles deeper into the ground, and pass features such as 'The Meatball' and the 'Railroad Tracks.'

The upper cave is more difficult to negotiate, with large rock piles to scramble over and an 8' lava wall to deal with. There is also a skylight and another entrance/exit at the top of the cave, with a path back to the main cave entrance.

This is an exciting adventure that can be paired with others in the southern Mount Saint Helens area, such as the Lava Canyon, Ape Canyon, or a hike up the south side of the mountain.