The Whitewater River Run in Washington State is a thrilling adventure for experienced kayakers and rafters. The ideal streamflow range for this run is between 1,000 and 3,000 cfs. This provides a good balance of challenging rapids and safety. The Whitewater River is classified as a class IV-V river, meaning it is challenging and requires advanced skills and experience. The total segment mileage of the run is approximately 7.5 miles.

There are several rapids and obstacles to be aware of on this run, including the "Jaws" section, which features a steep and technical drop. Another challenging section is the "Vortex" rapid, which requires precise maneuvering to navigate safely. Other notable rapids include "Surprise," "Twin Falls," and "Fish Ladder."

It is important to note that the Whitewater River Run is located within the Mount Rainier National Park, and there are specific regulations that must be followed. All boaters must obtain a permit from the park service, and group sizes are limited to six people. Additionally, all boaters must adhere to Leave No Trace principles and respect the natural environment.

Sources:
- American Whitewater: https://www.americanwhitewater.org/content/River/detail/id/3877/
- Washington State Parks: https://parks.state.wa.us/1343/Whitewater-River