The Whitewater River in California is a popular destination for rafting and kayaking enthusiasts. The headwaters of the river are located in Sec. 18, T5S, R2E, Hm and flow for approximately 30 miles before reaching the Pacific Ocean. The ideal streamflow range for whitewater rafting on the Whitewater River is between 300-800 cubic feet per second (cfs). The river is rated as Class II-IV, depending on the section being navigated. The segment mileage varies depending on the put-in and take-out points, but popular runs include the 10-mile section between Whitewater Preserve and Bonnie Bell, and the 6-mile section between Snow Creek and Painted Canyon.

The Whitewater River features a variety of rapids and obstacles, including boulder gardens, drops, and narrow chutes. Some of the most notable rapids include the Meatgrinder, which is a Class IV rapid located near Bonnie Bell, and the Painted Canyon rapid, which is a technical Class III rapid. It is important to note that the Whitewater River is subject to flash floods and can be dangerous during high water events.

There are specific regulations in place for the Whitewater River area, including restrictions on alcohol and drug use, and requirements for personal flotation devices (PFDs) and helmets. Additionally, permits may be required for certain sections of the river, and there may be restrictions on camping and fires in the surrounding areas.