The Whitewater River Run in California is a popular destination for whitewater enthusiasts. The ideal streamflow range for this segment is between 200 and 500 cubic feet per second (cfs). This class III-IV rated section of the river stretches for 14 miles, starting at the headwaters in Sec 27, T26N, R10W and ending one mile north of Fern Point, at the boundary of designated Eel River.

There are several rapids and obstacles that make this section of the river exciting, including the notorious "Fern Point Rapid," which is a class IV rapid with a steep drop and a large hole at the bottom that can be dangerous for inexperienced paddlers. Other challenging rapids include "Pinball" and "Boxcar."

There are specific regulations to the area that paddlers must follow. A permit is required to access the river, and camping is only allowed in designated areas. Visitors must also follow Leave No Trace principles to minimize their impact on the environment. Additionally, the use of glass containers is prohibited, and all waste must be packed out.

Overall, the Whitewater River Run offers a thrilling experience for experienced whitewater paddlers, with its challenging rapids, stunning scenery, and strict regulations to protect the environment.