The Whitewater River Run from the Confluence of Star Hope and Muldoon Creeks to the Confluence with East Fork in Idaho is a popular destination for whitewater enthusiasts. The ideal streamflow range for this segment is between 500 to 3,000 cfs, with the best time to paddle being in the spring and early summer. The class rating for this section of the river is class III to IV, with some challenging rapids and obstacles.

The segment mileage for this run is around 8 miles, and it typically takes around 3 to 4 hours to complete. Some of the notable rapids and obstacles on this stretch include the Triple Hole, Skull, and S-Turn. Paddlers should be experienced and have the necessary skills and equipment to navigate these rapids safely.

As for regulations, the area is managed by the U.S. Forest Service, and permits are required for commercial outfitters. Private boaters are allowed, but must follow all regulations and guidelines set forth by the forest service. Additionally, all boaters must pack out all trash and dispose of it properly to preserve the natural beauty of the area.

In conclusion, the Whitewater River Run from the Confluence of Star Hope and Muldoon Creeks to the Confluence with East Fork in Idaho is a thrilling whitewater adventure that requires experience, skill, and proper equipment. With the ideal streamflow range, class rating, segment mileage, and specific regulations in mind, paddlers can enjoy this beautiful stretch of river while respecting and preserving the natural environment.