The Whitewater River Run Tributary Headwaters to Wilderness Boundary in California is a Class IV-V river run with a recommended streamflow range of 400-800 cubic feet per second (cfs). The run covers a distance of approximately 7 miles and is known for its technical rapids. The first mile of the run is relatively calm, but the river then picks up pace and features several challenging rapids, including Sluice Box, The Maze, and the infamous Toilet Bowl.

Due to the challenging nature of the Whitewater River Run, there are specific regulations in place to ensure the safety of all visitors. Rafting and kayaking are only allowed during the spring and early summer months when the water levels are suitable. The use of personal flotation devices (PFDs) is mandatory, and all boaters are required to have a permit to use the river.

In addition to the regulations, there are several obstacles to be aware of on the Whitewater River Run. The Toilet Bowl, in particular, is a dangerous rapid that has claimed several lives over the years. Visitors are advised to exercise extreme caution and avoid this rapid if they are not experienced in navigating Class V rapids.

Overall, the Whitewater River Run Tributary Headwaters to Wilderness Boundary is a challenging and exciting river run that requires skill and experience to navigate safely. Visitors should be aware of the recommended streamflow range, class rating, segment mileage, specific river rapids/obstacles, and specific regulations to the area to ensure a safe and enjoyable trip.