The Whitewater River Run from Chief Joseph CG, Sec. 28, T9S, R15E to the Montana State Line, Sec. 34, T9S, R15E in Montana is a popular destination for experienced kayakers and rafters. The ideal streamflow range for this run is between 800-3000 cfs, with the best time to visit being in the late spring to early summer months. The river is rated a Class III-IV, making it a challenging run with significant rapids and obstacles.

The segment mileage for this run is approximately 9 miles, with a number of notable rapids and obstacles along the way. Some of these include The Notch, a narrow chute with a sharp turn and a steep drop, and Pinball, a series of boulder gardens and drops that require skilled maneuvering. Other notable rapids include Bodacious Boulders, The Kitchen Sink, and Jaws.

There are specific regulations and guidelines that must be followed when visiting this area, including the need to obtain a permit for overnight camping. Additionally, visitors are advised to bring adequate safety gear, including helmets and personal flotation devices, and to be aware of potential hazards such as strainers and undercut rocks.

Overall, the Whitewater River Run is a challenging and exhilarating experience for experienced kayakers and rafters, offering stunning scenery and thrilling rapids. However, it is important to approach the run with caution and to follow all safety guidelines and regulations to ensure a safe and enjoyable trip.