The Whitewater River Run from Three Cabins Creek to Confluence with East Fork Salmon River in Idaho is a 9-mile stretch of Class III rapids suitable for intermediate-level kayakers and rafters. The ideal streamflow range for this section of the river is between 800-2000 cfs.

The run begins with a calm section before quickly picking up pace and hitting rapids such as "Three Cabins Rapid," "Redside Rapid," and "Powerhouse Rapid." These rapids provide exciting challenges for paddlers with features such as holes, waves, and steep drops.

One of the main obstacles on this run is a diversion dam near Redside Rapid that must be portaged. It is important to scout ahead for any hazards and to be aware of changing water levels, as this section of the river can become much more dangerous during high-water events.

There are specific regulations to consider when running this section of the river, including the need for proper permits and knowledge of leave-no-trace principles. The area is also home to several endangered fish species, so it is important to take precautions to avoid disturbing their habitat.

Overall, the Three Cabins Creek to Confluence with East Fork Salmon River run offers a thrilling adventure for experienced paddlers in a beautiful, remote location in Idaho.