Ape Cave Lower Entrance was added to Your Favorites!

Cougar, Washington
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Stretching over two miles, Ape Cave was formed approximately 2,000 years ago by lava flows from Mount St. Helens.
The cave was named after the Mount St. Helens Apes, a local Boy Scout troop that explored the cave in the 1950s.
The lower cave is an easy walk suitable for families, while the upper cave offers a more challenging adventure with rock piles and an 8-foot lava fall.
Visitors can observe fascinating formations like lava stalactites and stalagmites, which are rare in lava tubes.
The cave maintains a cool temperature of about 42 degrees Fahrenheit, making it a refreshing escape during summer months.
The cave provides a habitat for unique cave-dwelling organisms, including some species of bats and insects.
This forest is one of the oldest national forests in the United States, offering diverse ecosystems and recreational opportunities.