The Whitewater River Run in California is a thrilling whitewater experience for experienced kayakers and rafters. The ideal streamflow range for this section is around 500 to 800 cfs. This section is rated as a class IV river, which means it has long, difficult rapids with powerful waves and large rocks. The segment mileage is approximately 10 miles, and it takes around 5 hours to complete.

One of the most challenging rapids in this section is called "Staircase," which has a series of steep drops and large waves. Other notable rapids include "The Notch," "Pinball," and "Tombstone." There are also several obstacles such as fallen trees and rocks that require paddlers to be skilled and experienced.

This section of the river is located on private land in Sec 1, T21N, R9W, and access is only permitted by the landowner. Paddlers must obtain permission beforehand and adhere to all rules and regulations set by the landowner. Additionally, the use of alcohol and drugs is strictly prohibited on this section of the river.

In conclusion, the Whitewater River Run in California is a challenging and thrilling whitewater experience. Paddlers must be experienced and skilled to navigate the rapids and obstacles. Access to this section is limited to those who obtain permission from the landowner, and all rules and regulations must be followed.