This is Kauai's most popular kayak activity. The Wailua River is perfect for kayaking and you'll paddle 2 miles each way up to a trailhead accessible only by boat. From here, you'll hike through a Hawaii Jungle for 1 mile until you arrive at a beautiful waterfall. The tour option includes a 1 hour stop here and you'll have to time to take and swim and absorb this amazing setting. Return the way you came and be back after a 5 hour tour. For most people this is certainly an adventure! It's 4 miles of paddling and 2 miles of hiking roundtrip.