Pipiwai Trail, Hiking trail in Haleakalā National Park, Maui, US.

Pipiwai Trail is a hiking route through Haleakalā National Park on Maui that winds through dense bamboo forests and crosses flowing streams. The path leads to a tall waterfall that drops dramatically at the trail's end.

The trail lies within Haleakalā National Park, established in 1916 as part of the Hawaiian Islands National Park before the separate park was created in 1961. The route passes the Ohe'o Gulch Stream, a giant banyan tree and a bamboo forest on its way to Makahiku Falls and Waimoku Falls, the round trip covering 4 miles (6.4 km).

The trail runs beside the Ohe'o Gulch Stream and passes a giant banyan tree and a dense bamboo forest, both named in trail descriptions as notable landmarks. The bamboo grove is the section most walkers remember, with tall green stalks forming a wall on either side of the packed-earth path.

The trail features maintained boardwalks and stone steps throughout, although some sections remain steep and muddy. Visitors should expect wet conditions and uneven ground, particularly after rainfall.

The trail passes a giant banyan tree, a landmark named in descriptions of the route alongside the bamboo forest. The 4-mile round trip also runs beside the Ohe'o Gulch Stream, so hikers see water and a single large tree as well as bamboo.