Hanakapi'ai Falls
The two mile trail from the beach to the falls is a pleasant hike, but we recommend taking it steady since the terrain is now even more rugged and slippery than before. The sides of the valley become increasingly steep, which often fools GPS positioning, but you needn't worry since going off course following the stream to the waterfall is very difficult to achieve.
The trail ends at the foot of this spectacular waterfall where you'll find torrents of water crashing down the cliff face into a large pool. And since Kauai is one of the wettest places on earth, chances are the falls will be in full flow.