Hanakapiai Falls, Waterfall in Kauai, US.

Hanakapiai Falls is a waterfall about 300 feet (91 m) high on the Na Pali side of Kauai, Hawaii. It is reached by a hike of approximately 2 miles (3.2 km) from Hanakapiai Beach. The trail is a popular day-hike for able-bodied hikers.

Ancient Hawaiian pathways along the Napali Coast formed the foundation for today's Kalalau Trail leading to the falls. These routes once connected settlements and taro gardens scattered across the region.

The falls sit at the end of the Kalalau Trail's first section, a route that follows old Hawaiian paths along the Na Pali Coast. Hikers today walk the same corridor that once linked coastal settlements and taro terraces. The plunge pool below the 91-metre drop is a customary rest stop before the return hike.

The trail is demanding and requires fitness plus preparation for muddy sections and steep inclines. Carry water and wear proper footwear to navigate safely.

On rainy days, rainbows often form over the pool as water breaks into fine mist. The surrounding mountain apple trees and bamboo forests create a secluded, green pocket at trail's end.