The Whitewater River Run from Source to Upper Palisades Lake in Idaho is a thrilling adventure for experienced whitewater enthusiasts. The ideal streamflow range for this run is between 800 and 2000 cfs, which typically occurs in late May through early July. This stretch of the river is rated as a Class IV-V, with steep drops and challenging rapids such as the notorious Devil's Staircase, Staircase Rapids, and Lunch Counter.

The segment mileage for this run is approximately 16 miles, with a put-in at the Source and a take-out at Upper Palisades Lake. Along the way, paddlers will encounter several obstacles such as boulder gardens, tight chutes, and large standing waves. This run requires advanced skill and experience, as the rapids are technical and require precise maneuvering.

In addition to the difficulty level, there are also specific regulations to this area that must be followed. The Whitewater River Run is located within the Targhee National Forest, and a permit is required to access the river. Additionally, all boaters must wear a personal flotation device and adhere to Leave No Trace principles to protect the natural environment.

Overall, the Whitewater River Run from Source to Upper Palisades Lake offers a challenging and exciting adventure for experienced whitewater paddlers. It is essential to check current streamflow levels and obtain the necessary permits before embarking on this journey.