The Whitewater River Run in Hawaii is a popular destination for whitewater enthusiasts. The ideal streamflow range is between 100 and 300 cfs, providing a thrilling and challenging adventure for Class III-IV rapids. The segment mileage is approximately 8 miles, starting at the Boundary Of Kalaupapa National Historical Park and ending at the Pacific Ocean.

The river features several rapids and obstacles, including Paddle Bender, which is a Class IV rapid that requires expert maneuvering skills to navigate. Other notable rapids include Powerline, Rodeo, and The Screaming Left Turn.

To ensure the safety of visitors, there are specific regulations in place for the area. Anyone using the river must wear a personal flotation device and a helmet. Additionally, all visitors must abide by the rules and regulations set forth by Kalaupapa National Historical Park.

Overall, the Whitewater River Run is a challenging and exciting adventure for experienced whitewater enthusiasts. It is important to be aware of the specific regulations and safety requirements before embarking on this adventure.