The Whitewater River Run from Headwaters to Mouth at Pelekunu Bay in Hawaii is a thrilling adventure for experienced paddlers. The ideal streamflow range for this run is between 200-500 cfs, which can increase to 700 cfs during heavy rain. This run is rated as Class IV-V, and covers approximately 7 miles of the river with a total drop of 1,500 feet.

The segment from the headwaters to the halfway point is the most challenging, with several Class V rapids including "Jaws" and "Pinball". Paddlers must carefully navigate through technical drops, narrow chutes, and steep boulder gardens. The second half of the run is less intense, with mostly Class III-IV rapids and scenic stretches of the river.

There are specific regulations for this area, including a permit requirement from the Department of Land and Natural Resources, and a limit of six paddlers per group. In addition, all paddlers must wear helmets and personal flotation devices. It is also important to be aware of the potential for flash flooding and the risk of falling rocks.

Overall, the Whitewater River Run is a challenging and exhilarating adventure for experienced paddlers seeking a thrilling whitewater experience. However, it is important to follow all regulations and safety precautions to ensure a safe and enjoyable trip.