The Whitewater River run, located in Southern California, spans a distance of approximately 4.5 miles, from one mile downstream of Black Rock to the western boundary of the San Gorgonio Wilderness. The ideal streamflow range for this run is between 200 and 500 cubic feet per second (cfs), which makes it suitable for intermediate paddlers. The stretch of river is rated as Class II-III, with several technical rapids and obstacles such as Teddy Bears, Staircase, and Pinball.

There are specific regulations in place for this area, including mandatory life jacket use for all paddlers, no littering, and no camping within 300 feet of the river. It is also important to note that permits are required for overnight stays and group sizes are limited to 12 people.

Overall, the Whitewater River run is a popular destination for whitewater enthusiasts seeking a moderate challenge. It is important to check current flow conditions before heading out, as the river can become dangerous during periods of high water.