The Whitewater River Run in California is a popular destination for whitewater enthusiasts. This section of the river runs from the Outlet of Martha Lake to the Northwestern Boundary of Kings Canyon National Park, covering a distance of approximately 5 miles. The ideal streamflow range for this stretch of the river is between 500 and 1500 cubic feet per second (cfs), and it is classified as a Class III-IV section, with some Class V rapids during higher flows.

The run features numerous rapids and obstacles, including the challenging "Toilet Bowl" and "S-turn" rapids. The river also has several large boulders and tight channels that require precise maneuvering. Due to the challenging nature of the river, it is recommended that only experienced paddlers attempt it.

Regulations for the area include a permit requirement for overnight camping, and visitors are advised to follow Leave No Trace principles. Additionally, visitors should be aware of the potential for flash floods during heavy rainfall.

Overall, the Whitewater River Run offers a thrilling whitewater experience for experienced paddlers. However, visitors should exercise caution and follow all regulations to ensure a safe and enjoyable trip.