The Whitewater River Run Headwaters to Sawtooth Wilderness Boundary in Idaho is a popular spot for thrill-seekers. The ideal streamflow range for this stretch is between 500 and 1500 cfs. This is considered a Class III-IV run, with some technical rapids and obstacles.

The segment mileage is approximately 10 miles, and paddlers can expect to encounter rapids such as "Lunch Counter," "Big Kahuna," and "Piece of Cake." These rapids are known for their powerful waves and steep drops, making them exciting and challenging for experienced paddlers.

It's important to note that this section of the river falls within the Sawtooth National Recreation Area, so there are specific regulations in place to protect the environment and wildlife. Paddlers are required to obtain a permit and follow Leave No Trace principles to minimize their impact on the area.

In addition, paddlers should be aware of the potential hazards of the river, such as submerged rocks and cold water temperatures. Proper gear and safety precautions should be taken to ensure a safe and enjoyable experience.

Overall, the Whitewater River Run Headwaters to Sawtooth Wilderness Boundary offers a thrilling adventure for experienced paddlers in a beautiful natural setting.