Ape Cave Geologic Site

Address not available
Toutle, WA 98649- Map It
(360) 449-7800

AAA Editor Notes

Ape Cave Geologic Site is on FR 8303, 1 mi. w. of FR 83. Thought to be the third longest lava tube in North America, the 13,042-foot tunnel was found within a massive lava flow that oozed from the volcano almost 2,000 years ago. Flowing downhill, the stream of lava cooled and formed a hard crust. In time the lava drained and left an intricate, winding lava cave behind. The cave was discovered in 1947 but not explored until the early 1950s by a local Boy Scout troop. The scouts named the cave in honor of their sponsor, the St. Helens Apes. Visitors should have a minimum of two light sources, extra batteries, sturdy shoes and a jacket; the temperature is a constant 42 degrees Fahrenheit. Rental propane lanterns are available at the information station.
Admission May-Oct. $5 (per private vehicle). Rental lantern $5.
Hours: Cave open daily 24 hours. The Ape Cave Headquarters is open daily 10:30-5:30, mid-June through Labor Day; Sat.-Sun. 10:30-5:30, Memorial Day weekend to mid-June. Guided tours depart Mon.-Fri. 11-3, late June-Labor Day.