Extreme river adventure awaits you! Explore the beautiful scenery of the Big Island's Umauma River for a swim, float, rappel and hike through the valley. Enjoy the natural beauty and unique features the Umauma River has to offer. Make memories that will last a lifetime as you experience the coolest adventure in Hawaii. Start your rappel experience by rappelling 250 feet into the Umauma valley. The last 20 feet is a cave, so you will free rappel right into the Umauma River. But don't worry, you will be fully equipped with a wetsuit, tobbies and all the necessary top of the line rappelling safety gear. Once you enter the river, you will relax as you float down the Umauma river to a 100 year old flume dam. This dam was made in 1910 and is still perfectly intact today. It's level surface makes for an infinity pool like experience in the river! Next, you will boulder down a short distance to a natural stone slide formation where you will slide right into a large pool. On this tour, you will rappel down two waterfalls and even end with a jump (optional) at our private pond. Come to the Big Island and play book this unique Rappel and River Experience today.