Gifford Pinchot National Forest

Apes' Headquarters

The Apes' Headquarters at Ape Cave, is open daily from mid-June through Labor Day (September 7), from 10 a.m. to 5 p.m.

Guided Cave Walks are offered daily during the summer visitor season (when Ape's Headquarters is open). Details are available at Ape's Headquarters

Lantern Rental: $5

Winter and after-hours visitors will need to bring your own light sources to explore the cave.

Hike the furthest reaches of a lava tube formed from an eruption of Mount St. Helens 2,000 years ago.

Ape Cave is open year round. However, the Apes Headquarter's is closed between Labor Day (Sept 7th) and late June. The Apes' Headquarters at Ape Cave, will be open daily from 10 a.m. to 5 p.m. The cave is cool (45 deg F all year) and wet during rainy days.


Apes' Headquarters is located at Ape Cave on the south side of Mount St. Helens on Forest Road 8303, 3 miles north of the junction of Forest Roads 83/90.