The Salmon River's Whitewater River run spans from Sec. 23, T26N, R10E to the North Boundary of the Frank-Church Wilderness, Road #468 in Idaho. The ideal streamflow range for this segment of the river is between 1,500 and 30,000 cubic feet per second (cfs). The Whitewater River run has a class III to IV rating, with rapids such as Snowhole, Weber, and Devil Creek. The segment covers a total of 22 miles.

The Snowhole rapid is a Class IV rapid with a tight chute that requires precise maneuvering. The Weber rapid is a Class III rapid that can be challenging due to its swirls and eddies. The Devil Creek rapid is a Class IV rapid with several challenging waves.

Specific regulations to the area include a permit requirement for all river users, as well as a fire ban in the Frank-Church Wilderness area. Additionally, all waste must be carried out, and camping is only allowed in designated areas.

In conclusion, the Whitewater River run on the Salmon River in Idaho is a challenging and exciting stretch of river with a Class III to IV rating, spanning 22 miles. The ideal streamflow range is between 1,500 and 30,000 cfs, and there are specific regulations in place to protect the area and ensure a safe and enjoyable experience for all river users.