The Whitewater River is a popular destination for kayaking and rafting in the state of Washington. The ideal streamflow range for the river is between 500 and 2000 cfs. The river is rated as a Class III to IV, meaning it has whitewater rapids and obstacles that require experienced paddling skills.

The river run spans over 20 miles from its headwaters to its confluence with the Hoh River. The segment mileage varies in difficulty, with the upper section being more challenging and the lower section more suitable for beginners. Some of the most notable rapids and obstacles on the river include House Rock, Rooster Tail, and Twisted Sister.

There are specific regulations in place to protect the river and ensure the safety of paddlers. These include restrictions on the use of motorized watercraft and the requirement for any rafting or kayaking groups to have a certified guide. Additionally, all paddlers are required to wear a personal flotation device and carry a whistle.

Overall, the Whitewater River is a thrilling destination for experienced paddlers seeking a challenging adventure. With its diverse range of rapids and obstacles, it offers a unique and exciting experience for those looking to explore the beauty of Washington's natural landscapes.