The Whitewater River Run Shell Rock Creek Trib in California is an exciting run for experienced kayakers and rafters. The ideal streamflow range for this segment is between 200 and 400 cfs. The segment stretches for 4 miles and is rated as Class IV, with some Class V rapids. It features several challenging sections, including "Satan's Cesspool" and "The Witches Cauldron," which require expert navigation skills.

There are specific regulations for this area, including a permit requirement for commercial trips. Private boaters must also obtain a permit and are limited to groups of six or fewer. The area is also subject to seasonal closures and restricted access during high water events. It is important to check with local authorities before planning a trip.

In summary, the Whitewater River Run Shell Rock Creek Trib in California is a challenging and exciting run for experienced kayakers and rafters. With a recommended streamflow range of 200-400 cfs, Class IV-V rapids, and strict regulations, it is important to plan accordingly and exercise caution while on the water.