The Whitewater River Run from Headwaters at Josephine Lake to Alpine Lakes Wilderness Boundary is a thrilling rafting experience in the state of Washington. The ideal streamflow range for this run is between 300-1200 cfs, with the higher end of the range providing more challenging rapids. The class rating for this run is class III-IV, making it suitable for intermediate to advanced paddlers.

The segment mileage for this run is approximately 6 miles, with several notable rapids and obstacles along the way. One such rapid is known as "Pinball," which features a series of boulder-strewn drops and can be challenging to navigate. Another obstacle is "The Notch," a narrow channel with a steep drop that requires precise maneuvering.

There are specific regulations to be aware of when rafting in this area. Permits are required for all overnight trips, and visitors are encouraged to practice Leave No Trace principles to minimize their impact on the environment. Additionally, motorized watercraft are not allowed on this section of the river.

Overall, the Whitewater River Run from Headwaters at Josephine Lake to Alpine Lakes Wilderness Boundary offers a challenging and exhilarating rafting experience for those with the skills and experience to tackle its rapids. Safety should always be a top priority, and visitors should be aware of the specific regulations and guidelines for this area to ensure a safe and enjoyable trip.