The Selway River, located in Idaho, boasts a challenging and scenic whitewater river run. The ideal streamflow range for this river is between 1,200 and 3,000 cubic feet per second (cfs). The Selway River is classified as a Class IV-V river, with some challenging rapids and obstacles.

The river run covers a segment of approximately 47 miles, starting at Sec. 22, T32N, R11E and ending at the headwaters. Some of the notable rapids and obstacles on the Selway River include Moose Creek Rapid, Ladle Rapid, and Double Drop Rapid. These rapids require a high level of skill and experience to navigate safely.

To protect the natural beauty and resources of the Selway River, there are specific regulations in place for the area. A permit is required to float the Selway River, with a limited number of permits available each year. Additionally, campfires are prohibited along the river, and all human waste must be carried out.

In conclusion, the Selway River is a challenging and scenic whitewater river run in Idaho. The ideal streamflow range is between 1,200 and 3,000 cfs, and the river is classified as Class IV-V. The segment covers approximately 47 miles and includes challenging rapids and obstacles. Specific regulations are in place to protect the natural resources of the area, including the need for a permit and restrictions on campfires and human waste.