The Whitewater River Run in Montana is a thrilling adventure for experienced paddlers. The ideal streamflow for this segment is between 500 and 2000 cfs. This section of the river is rated class III-IV, with steep drops and narrow channels that require precise maneuvering. The segment is 22 miles long and takes approximately 2-3 days to complete.

The river features several challenging rapids, including the notorious "Wall," which requires paddlers to navigate a narrow channel between two large boulders. Other notable rapids include "Triple Bridges," "Washer Woman," and "Pipeline." The river also has several dangerous strainers and log jams that require careful attention and skill to navigate.

Specific regulations for this area require all paddlers to wear a personal flotation device and carry a whistle. Boaters must also follow Leave No Trace principles and obtain a permit from the US Forest Service. Additionally, motorized watercraft are prohibited on this section of the river.