The Whitewater River Run from Headwaters to Confluence with Alta Creek in Idaho is an exciting adventure for whitewater enthusiasts. The ideal streamflow range for this run is between 500-3000 cfs, which offers challenging rapids while still allowing for safe navigation. The segment mileage for this run is approximately 4 miles, with a class rating of III-IV. This class rating means that the rapids in this section of the river are moderate to difficult and require experienced paddlers with good control and maneuverability.

Some of the specific river rapids/obstacles that paddlers will encounter on this run include Pinball, the Corkscrew, and Box Car. Pinball is a series of large boulders that create a fast and technical rapid. The Corkscrew is a steep and twisting rapid that requires precise maneuvering. Box Car is a large boulder that creates a powerful hydraulic, which can be difficult to navigate.

Specific regulations to the area include a requirement for all paddlers to wear a personal flotation device (PFD) at all times and to have a whistle attached to their PFD. It is also recommended that paddlers have a helmet, appropriate footwear, and a drysuit or wetsuit for cold water conditions.

In conclusion, the Whitewater River Run from Headwaters to Confluence with Alta Creek in Idaho is a thrilling adventure for experienced paddlers. With an ideal streamflow range of 500-3000 cfs, a class rating of III-IV, and exciting rapids such as Pinball, the Corkscrew, and Box Car, this run offers a challenging and unforgettable experience. However, paddlers should be aware of specific regulations and safety measures to ensure a safe and enjoyable trip.