Explore a chilly, pitch-black lava tube over two miles long. A short, paved, accessible Ape Cave Interpretive Site trail beneath towering trees leads to a stairwell into the cave. The ¾ mile, one-way lower cave route is relatively easy and family-friendly. For the more adventurous, the 1.5-mile upper cave route leads to a climb up an eight-foot rock wall and scramble over rock piles, then an exit and a 1.5-mile above-ground hike back to the parking lot.