The Whitewater River run below Cougar Dam to the confluence with McKenzie River in Oregon is a popular whitewater rafting destination. The ideal streamflow range for this section is between 1,000 and 4,000 cfs. The segment mileage for this stretch is approximately 10 miles, and the class rating is from Class II to Class IV, making it suitable for intermediate to advanced paddlers.

There are specific rapids and obstacles that paddlers need to be aware of, including the Boulder Garden rapid, which has a large boulder field that requires careful navigation. The Rockpile rapid also has several large boulders that create challenging hydraulics. Another notable obstacle is the Pinball rapid, which has several large holes and waves that create a fun and challenging ride.

To ensure the safety of all paddlers, there are specific regulations in place for this area. All paddlers must wear a properly fitted personal flotation device (PFD) and a helmet at all times while on the water. Additionally, all boats must have a whistle and a throw rope. Paddlers must also adhere to Leave No Trace principles, pack out all trash, and avoid disturbing the natural environment.