This waterfall is at the end of the 4-mile (one-way) day hike on Kaua’i where you go down 2 miles of the Na Pali Coast, and then you follow a valley away from the ocean up a stream, which you cross many times until you find this waterfall at the head of the valley, after 2 more miles. It’s pretty hard to get lost, but it’s easy to fall in the muddy rainy season. As you can see, it’s a popular hike… and well worth it.