The Whitewater River Run begins in Section 35, T4S, R1E, Hm in California and runs until it reaches its junction with the Mattole River. The ideal streamflow range for this run is between 600 and 1500 cfs. It is rated as a class III-IV run with a total segment mileage of around 10 miles.

This run features several notable rapids and obstacles, including "Pinball," a rapid with several large boulders that requires precise navigation, and "The Squeeze," a narrow section of the river that can be challenging to pass through. It is important to note that there are several sections of this run that are not suitable for novice paddlers and should only be attempted by experienced whitewater enthusiasts.

Specific regulations for this area include the requirement for a California River Access Permit for any vehicles parked along the riverbank. Additionally, visitors should be mindful of any posted signs or restrictions related to camping, campfires, and other activities. It is important to leave the area as you found it and respect the natural environment.

In conclusion, the Whitewater River Run is a challenging and exciting whitewater experience that requires skill and experience to navigate safely. Visitors should be mindful of specific regulations and respect the natural environment to ensure the longevity of this beautiful natural resource.