The whitewater river run from Source, Sec. 19, T39N, R13E to Road #581 near Moose Ck, Sec. 16, T39N, R11I is a popular destination for whitewater enthusiasts in Idaho. The ideal streamflow range for this segment is between 1,000 and 3,500 cubic feet per second (cfs), with the best time to run it being in late May to early June. The segment covers a total of 20 miles and is rated as Class III to IV, making it suitable for intermediate to advanced paddlers.

The river features several notable rapids and obstacles, including Devil's Tooth, a Class IV rapid that requires experienced maneuvering; Growler, a steep drop that can cause flips and wraps; and a tight canyon section known as the Squeeze. Paddlers should be prepared for technical maneuvering, rocks and boulders, and swift currents throughout the run.

Specific regulations to the area include a permit requirement for commercial outfitters, as well as a requirement to pack out all trash. The run is also subject to seasonal closures and restrictions, so paddlers should check with local authorities before planning their trip.

Sources consulted for this information include American Whitewater and Idaho River Sports.