The Whitewater River Run in Washington state is a popular destination for whitewater enthusiasts. The ideal streamflow range for this river is between 500-2000 cfs, which provides a challenging but navigable experience for experienced paddlers. The river is rated as a class III-IV, with numerous rapids and obstacles throughout the run.

The segment mileage of the Whitewater River Run is approximately 5 miles, starting at the headwaters and including all tributaries within the park until it reaches the confluence with North Fork Skokomish River. This stretch of river offers a mix of technical rapids, including boulder gardens and steep drops, as well as sections of calm water that allow for recovery between rapids.

There are specific regulations in place for this area, including permits for group use and regulations on camping and campfires. It is important for visitors to familiarize themselves with these regulations before embarking on the Whitewater River Run.

Overall, the Whitewater River Run provides a thrilling and challenging experience for seasoned paddlers. However, it is important to note that this river is not recommended for beginners or those without experience navigating class III-IV rapids.