The Whitewater River, located in the northern California region, flows from its headwaters in Sec. 15, T3S, R1E, Hm. to its junction with the Mattole River. The ideal streamflow range for rafting is between 800-1,200 cfs. The river is classified as Class III-IV, making it ideal for intermediate to advanced level rafters. The segment mileage of the river run is approximately 12 miles.

There are several notable rapids and obstacles along the Whitewater River, including the Hell's Gate rapid, which is known for its steep drop and narrow passageway. Other notable rapids include the Waterfall rapid, which features a 10-foot drop, and the S-Turn rapid, which requires precise maneuvering through a series of sharp turns.

There are specific regulations to the area, including restrictions on the use of alcohol, and a requirement for all rafters to wear appropriate safety gear, including helmets and life jackets. Additionally, there are restrictions on the number of rafts allowed on the river at one time to help preserve the natural environment.

Overall, the Whitewater River offers a thrilling and challenging rafting experience for experienced rafters looking for an adrenaline rush. It is important to follow all regulations and safety guidelines to ensure a safe and enjoyable experience.