Experience tropical paradise on an adventure-filled 3.4-hour nature tour around the Big Island’s Umauma gorge and river. Rappel down waterfalls, swim in fresh water, and slide down naturally formed rock slides. Rest assured with all wet suites, flotation devices and safety briefings included. Feel the thrill of repelling down 250 feet (76 meters) of rock directly into the river, and then swim, hike, and jump off cliffs (if you dare). After your thrilling day, sit down for lunch with your group before returning to the visitor center. Guests must be at least eight years old and between 80-250 pounds to participate. The tour is not suitable for people who are pregnant or have a history of back or neck injury.