The Whitewater River Run from Headwaters to Confluence with Little Beaver Creek is a 16-mile stretch of Class III-IV rapids in Idaho. The ideal streamflow range for this section of the river is between 1,000 and 3,000 cfs, which typically occurs during the spring runoff season.

The Class III-IV rating of this section of the river means that it has moderate to difficult rapids with high waves, irregular rocks, and narrow passages. Some of the specific rapids and obstacles on this section of the river include "Lunch Counter," "Big Kahuna," and "Pine Creek."

It is important to note that this section of the river is not suitable for beginners or inexperienced paddlers. Additionally, all boaters are required to wear a personal flotation device and carry a whistle at all times.

The Whitewater River Run from Headwaters to Confluence with Little Beaver Creek is a popular destination for whitewater enthusiasts and is frequently guided by local outfitters. Visitors to the area should be aware of the regulations and safety guidelines in place to ensure a fun and safe experience on the river.