The Hemlock Road Bridge to Gifford Pinchot National Forest Boundary Whitewater River Run in Washington State is a popular route for kayakers and rafters. The ideal streamflow range for this section of the river is between 500 and 1500 cubic feet per second (cfs), with higher flows being more challenging. The class rating for this section is class III to IV, with some sections reaching class V during high water.

This segment of the river is approximately 8.5 miles long and features several notable rapids and obstacles. Some of the most significant rapids include Boulder Drop, a class IV rapid that requires precise navigation through a narrow chute, and The Slot, a challenging class V rapid with a steep drop and tight channel.

There are specific regulations in place for this area. All boaters must have a valid Washington State Discover Pass, and all kayakers and rafters must wear a personal flotation device (PFD) at all times. Additionally, there are restrictions on the use of motors and drones in the area.