The Whitewater River Run from Lake 10,559 to the Wilderness Boundary Just Below Tokopah Falls in California is a thrilling and challenging river run that offers a range of rapids and obstacles for experienced whitewater enthusiasts. The ideal streamflow range for this segment of the river is between 400 and 700 cubic feet per second (cfs) during the spring and early summer months.

The class rating for this segment of the river ranges from Class III to Class IV, making it suitable for experienced paddlers with advanced skills and the ability to navigate technical rapids and obstacles. The segment mileage is approximately 7.5 miles, offering ample opportunities for adventure and exploration.

Specific river rapids and obstacles on this segment of the river include Devil's Elbow, a Class IV rapid with a sharp drop and tight turn, as well as Toadstool, a technical Class III rapid with multiple channels and obstacles to navigate.

In terms of regulations, the area is managed by the National Park Service and requires a wilderness permit for overnight camping and backcountry travel. Additionally, visitors must adhere to Leave No Trace principles and pack out all trash and waste.

Overall, the Whitewater River Run from Lake 10,559 to the Wilderness Boundary Just Below Tokopah Falls offers a challenging and exciting whitewater experience for experienced paddlers, with a range of rapids and obstacles to navigate and stunning natural scenery to enjoy.