The Whitewater River Run, which flows from the inlet to Marsh on Spring Creek to the outlet of Marsh on Spring Creek in Idaho, is a popular destination for whitewater enthusiasts. The ideal streamflow range for this segment is between 100 and 500 cubic feet per second (cfs), with peak flows occurring in the spring and early summer.

The class rating for this segment varies between Class II and Class IV, depending on the specific stretch of river. The total segment mileage is approximately 5 miles, and features several challenging rapids and obstacles, including "Pinball," "The Maze," and "The Gauntlet."

Regulations in the area include a requirement for all boaters to wear a personal flotation device (PFD), and a prohibition on alcohol consumption while on the river. Additionally, all boaters are required to obtain a permit from the Bureau of Land Management before embarking on the trip.