The Whitewater River, located in the Three Sisters Wilderness Boundary to Cougar Reservoir in Oregon, is a popular destination for canoeing, kayaking, and rafting. The ideal streamflow range for this river is between 400-1200 cfs, with higher flows during the spring season due to snowmelt. The river is rated as Class III-IV, with challenging rapids and obstacles such as Tight Squeeze, Gobbler, and Pinball. The segment mileage for the river run is approximately 14 miles.

There are specific regulations to the area, including the need for a permit to access the Three Sisters Wilderness Boundary. Visitors are required to follow Leave No Trace principles and abide by fire restrictions. Additionally, motorized boats are not allowed on the Whitewater River.

Overall, the Whitewater River run is a thrilling and challenging experience for experienced paddlers. However, it is important to always be aware of changing river conditions and follow all safety guidelines to ensure a safe and enjoyable trip.