The Whitewater River Run stretches from the Gospel-Hump Wilderness Boundary to the headwaters near Hump Lake, covering a distance of approximately 20 miles. The ideal streamflow range for this section of the river is between 500-1000 cubic feet per second (cfs). The class rating for this section of the river is mainly Class III, but the rapids can reach Class IV during high water. Some of the notable rapids and obstacles include Decker Creek Rapid, Hump Lake Drop, and Cow Creek Falls.

The Whitewater River Run flows through the Gospel-Hump Wilderness Area, which has specific regulations to protect the wilderness and wildlife. The Wilderness Act of 1964 prohibits the use of motorized vehicles, including boats, within the wilderness area. Additionally, visitors are required to obtain a permit before entering the wilderness area, and visitors are expected to follow Leave No Trace principles to minimize their impact on the environment.

Overall, the Whitewater River Run is a challenging and exciting rafting experience that requires a high level of skill and experience. It is important to pay attention to water levels, follow safety protocols, and respect the regulations in place to protect the wilderness area.