The Whitewater River is a tributary of the Tye River in the state of Washington, and it flows through the Alpine Lakes Wilderness area. The ideal streamflow range for this river is between 500 and 1500 cfs, and it has a class rating of III-IV. The segment mileage for this river run is approximately 5.5 miles, stretching from the wilderness boundary to the confluence with the Tye River.

Some of the notable rapids and obstacles on this river run include the "Meatgrinder," "Stinkbug," and "Boulder Drop." The Meatgrinder is a rapid that requires precise navigation through a narrow channel, while the Stinkbug is a technical and steep drop. The Boulder Drop is a class IV rapid with a large boulder in the middle of the river that requires careful maneuvering.

There are specific regulations in place for this area, including the prohibition of motorized watercraft and camping within 200 feet of the river. Additionally, a permit is required to enter the Alpine Lakes Wilderness area. It is important for river runners to be knowledgeable about the regulations and to practice Leave No Trace principles to minimize their impact on the environment.