The Whitewater River Run from Elk Creek to the Slackwater of Ponds Power Dam in Idaho is a thrilling adventure for experienced whitewater enthusiasts. The ideal streamflow range for this run is between 1500 and 3000 cfs. This section of the river is rated as a Class III to IV difficulty, with some rapids reaching Class V during peak flows. The segment mileage for this run is approximately 6 miles.

There are several notable rapids and obstacles along this section of the river, including Widowmaker, Jacob's Ladder, Suicide Falls, and Trashcan. Widowmaker is a Class IV+ rapid that requires precise maneuvering to navigate safely. Jacob's Ladder is a steep, technical rapid that drops 15 feet in a short distance. Suicide Falls is a Class V rapid that requires expert-level skills and should only be attempted by experienced kayakers. Trashcan is a large hydraulic feature that can be dangerous if not navigated properly.

Specific regulations for this area include a requirement for all boaters to wear a personal flotation device and a helmet. Additionally, motorized watercraft are not allowed on this section of the river. It is also important to note that this section of the river is only recommended for experienced whitewater enthusiasts, as the rapids and obstacles can be extremely challenging.