The Alta Creek to Confluence with Feather River whitewater river run in Idaho is a thrilling adventure for experienced kayakers and rafters. The ideal streamflow range for this run is between 500-1000 cfs, which provides moderate to challenging rapids for paddlers.

This segment covers approximately 10 miles of Class III-V rapids, including the infamous "Hemorrhoid" and "Staircase" rapids. These rapids are known for their technicality and require expert navigation skills. Additionally, paddlers must also navigate around various obstacles such as boulders, fallen trees, and sharp turns.

Regulations in this area require all boaters to wear a personal flotation device, and kayakers must also wear a helmet. Additionally, boating permits are required and can be obtained from the Idaho Department of Parks and Recreation.

In summary, the Alta Creek to Confluence with Feather River whitewater river run is a challenging adventure for experienced paddlers. With its ideal streamflow range, Class III-V rapids, and various obstacles, this segment provides an exciting and technical journey. However, it is important to follow regulations and safety guidelines to ensure a safe and enjoyable experience.