The Whitewater River Run from Trail Creek to Sawtooth National Forest Boundary in Idaho is a popular destination for experienced whitewater enthusiasts. The ideal streamflow range for this section is between 800-3000 cfs, depending on the time of year and recent precipitation. The class rating for this section is Class III-IV, with some technical rapids and obstacles such as S-Turn, Eye of the Needle, and Rocky Falls.

The segment mileage for this section is approximately 8 miles, with stunning views of the surrounding wilderness and the Sawtooth Mountains. It is important to note that this section of the river is only navigable during certain times of the year, typically from late May to early July.

There are specific regulations to the area, including a permit requirement for commercial use and a limit on the number of users per day. Additionally, all users must wear a personal flotation device and be prepared for cold water temperatures.