The Whitewater River Run is a thrilling adventure that spans from the Idaho State Line to the Confluence with Beaver Creek in Idaho. The ideal streamflow range for this section of the river is between 1,000 and 4,000 cfs. The class rating for this section of the river is Class III, making it suitable for intermediate rafters. The segment mileage for this run is approximately 7 miles.

As for specific rapids and obstacles, the Whitewater River Run features several exciting sections. The first rapid, known as "Deadwood Falls," is a Class III rapid that requires skilled maneuvering to navigate safely. The "Last Chance" rapid is another thrilling section of the run that features large waves and strong currents. Other notable rapids include "Cable Car," "Coyote Creek," and "Screaming Left."

When it comes to regulations for the area, all boaters are required to obtain a permit before embarking on the Whitewater River Run. Additionally, it is important to note that the river can be dangerous at high water levels, so it is recommended to check current conditions and streamflow levels before beginning your journey.

Overall, the Whitewater River Run is an exhilarating adventure that offers intermediate rafters an exciting challenge. With its stunning scenery, challenging rapids, and unique obstacles, this section of the river is a must-visit for any thrill-seeking rafter.