.

The Big Creek river run is a popular whitewater experience located in the state of California. The ideal streamflow range for this river is between 500 and 1500 cubic feet per second (cfs), which usually occurs in the early spring months due to snowmelt. The river is rated as a Class IV-V experience, meaning that it is considered to be an advanced level of difficulty with significant rapids and obstacles. The segment mileage for the Big Creek run is approximately 7 miles.

One of the notable rapids on this river is called "Hell Hole," which is a challenging Class V rapid that includes a steep drop into a deep hole. Other notable obstacles on the river include "S-turn," "Surprise," and "Crystal." Due to the challenging nature of this river, it is recommended that only experienced whitewater enthusiasts attempt to navigate it.

In terms of regulations, the Big Creek river run is managed by the US Forest Service and requires a permit to access. Additionally, the area is subject to seasonal closures and restrictions, so it is important to check with the Forest Service before planning a trip. Overall, the Big Creek river run offers a thrilling and challenging whitewater experience for experienced paddlers.