Waimoku Falls

Waimoku Falls is a roughly 400-foot cascade at the end of Pīpīwai Trail in Haleakalā’s remote Kīpahulu District. Allow the full 4-mile round trip and 800 feet of climbing; the trail is rated moderately strenuous. This is a forest walk with a waterfall at the far end, not a roadside stop. Kīpahulu is 12 miles past Hāna on Hāna Highway. It’s hot, humid, and rainy here, so bring drinking water, food, sturdy shoes, and fill up on fuel before you go; there are no food, supplies, or fuel in the park.

Pīpīwai starts by the Kīpahulu Visitor Center and parking area. Makahiku Falls overlook is about half a mile in, and the bamboo forest begins around a mile. From there, the trail follows streams over boardwalks and footbridges. The waterfall is the headline, but the bamboo grove, banyan, and streamside scenery are what make the long walk feel like a full visit.

The marked trail ends at the Waimoku Falls viewing area. From there, the cascade drops down a dark cliff framed by dense green foliage. Take your photo from the marked viewpoint and keep the rock wall and surrounding plants in the frame. Don’t follow informal paths toward the plunge pool or enter the stream: off-trail travel is illegal, and flash floods and sudden rockfalls can happen here.

Pīpīwai’s water is habitat for endemic freshwater shrimp and rock-climbing gobies. The Hawaiian islands formed over a volcanic hotspot and sit far from continents; their isolation shaped unusual native plants and animals. If you pause by the stream, look from the trail rather than wading in.

Native Hawaiians have lived in Kīpahulu for hundreds of years, and its traditional ahupuaʻa link resources from mountain to sea. The falls sit in that wider landscape, so leave the stream and surrounding area as you found them.