The Whitewater River Run in Montana spans from the Hebgen Lake Dam, Sec. 23, T11S, R3E to the Gallatin Forest Boundary, Sec. 35, T11S, R2E. This section of the river is known for its scenic beauty and challenging rapids, making it a popular destination for whitewater enthusiasts.

The ideal streamflow range for this stretch of the river is between 1,500 and 3,000 cubic feet per second (cfs), which typically occurs during the spring and early summer months. The class rating for this section of the river ranges from class III to IV, providing a thrilling experience for experienced paddlers.

The segment mileage of this river run is approximately 10 miles, with numerous rapids and obstacles to navigate along the way. Some of the more challenging rapids include House Rock, Green Wall, and Screaming Left Turn. Paddlers should be aware of potential hazards such as submerged rocks, undercut ledges, and strong currents.

Specific regulations to the area include a permit requirement for commercial outfitters, as well as restrictions on the use of motorized watercraft. Additionally, all paddlers are required to wear a personal flotation device (PFD) and follow Leave No Trace principles to minimize their impact on the environment.

Overall, the Whitewater River Run in Montana offers a challenging and scenic experience for experienced paddlers. It is important to check current streamflow conditions and adhere to all regulations and safety precautions to ensure a safe and enjoyable trip.