The Whitewater River Run in California is a popular destination for kayakers and rafters, running from the West Branch Nelson Creek Headwaters to the Confluence with Nelson Creek. The ideal streamflow range is between 200-500 cubic feet per second (cfs), with higher flows being more challenging and lower flows requiring more technical maneuvers. The class rating for this run ranges from Class II to Class IV, depending on the section.

The segment mileage for this run is approximately 7.5 miles, with specific river rapids and obstacles including S-turns, boulder gardens, and drops. One of the more notable rapids is called "Fuji" and is a Class IV rapid with a large boulder in the middle of the channel.

There are specific regulations to the area, including the requirement for a valid California fishing license if fishing, and a permit is required for any camping in the surrounding areas. Additionally, all boaters must wear a personal flotation device (PFD) while on the river.

Overall, the Whitewater River Run is a challenging and exciting destination for experienced boaters, with its varying flow and class rating providing a unique and thrilling experience.