The Whitewater River in California begins in Section 27, T2S, R2W, HM and flows west towards the Pacific Ocean. The ideal streamflow range for the Whitewater River is between 200-500 cubic feet per second (cfs) for a Class III rating, and 500-1000 cfs for a Class IV rating. The river spans a total of 30 miles, with the first 7 miles being a Class IV-V section that is not recommended for inexperienced paddlers. The remaining 23 miles are Class II-III sections that are suitable for intermediate paddlers.

There are several notable rapids and obstacles along the Whitewater River, including "Boulder Drop," a Class V rapid that requires advanced paddling skills and "Hall of Fame," a Class III rapid that features large boulders and narrow channels. Due to the potentially dangerous nature of the river, there are several regulations in place to ensure safety. All paddlers must wear a lifejacket and helmet, and commercial operators must have a permit and follow specific safety protocols.