The Whitewater River run in Oregon's Siskiyou Mountains is a classic whitewater experience. The ideal streamflow range for this run is around 500-1000 cfs. This stretch of river is class III-IV, with some sections pushing into class V during high water. The segment mileage is approximately 10 miles from the Headwaters to the Confluence with Unnamed Creek West of Bruler Creek.

The Whitewater River features many challenging rapids, including Upper and Lower Bouncing Betty, The Wall, and Widowmaker. These rapids contain steep drops, technical moves, and big waves. There are also several sections with boulder gardens and tight channels that require precise navigation.

In terms of regulations, the Whitewater River is located within the Kalmiopsis Wilderness and is protected under the Wilderness Act. This means that visitors must follow Leave No Trace principles, and no mechanized or motorized equipment is allowed. Additionally, there are restrictions on group size and camping locations to protect the fragile ecosystem.

Overall, the Whitewater River run is a thrilling adventure for experienced whitewater enthusiasts. It is important to check current streamflow levels and weather conditions before attempting this run, as it can be dangerous during high water.