Kalalau Beach along the Na Pali Coast - Kauai, Hawaii At the end of the 11 mile Kalalau Trail is a spectacular beach that provides those who hike one of the world's most difficult hikes with a view like this. The Kalalau trail has been voted a 10 out of 10 on beauty, and a 9 out of 10 on difficulty. This 11 mile (one way) hike is filled with spectacular views and very dangerous cliffs. The trail zigzags in and out of the canyon walls along the Na Pali coast on