The Whitewater River Run in Washington state is a popular destination for kayakers and rafters. The ideal streamflow range for this run is between 800-2000 cfs. The segment mileage of this run is approximately 6 miles, starting at the end of Graves Creek Road and ending at the western boundary of Olympic National Park.

The class rating for this run is class III to IV, with some technical class V rapids. Some of the specific rapids and obstacles on this run include Boulder Drop, the Narrows, and the Flume. Boulder Drop is a class V rapid with a steep drop and a big hole at the bottom. The Narrows is a technical class IV rapid with tight rocks and a fast current. The Flume is a class III rapid with a fun wave train.

It is important to note that there are specific regulations for this area. Permits are required for overnight trips, and all boaters must carry a Washington State Discover Pass for vehicle access to the put-in and take-out areas. Additionally, all boaters must adhere to the Leave No Trace principles and pack out all trash.

Overall, the Whitewater River Run is a challenging and exciting destination for experienced kayakers and rafters. It is important to verify streamflow levels and adhere to all regulations for a safe and enjoyable experience.