The Whitewater River Run Wilderness Boundary to Confluence with Middle Fork Stanislaus is a popular whitewater destination located in California. The ideal streamflow range for this segment is between 500 and 2,000 cubic feet per second (cfs) for optimal rapids and navigability. The class rating for this section is Class III-IV, meaning it has moderate to difficult rapids that require experienced paddlers and equipment.

The segment covers roughly 16 miles of the river and features several notable rapids and obstacles, including the Class IV Clavey Falls and the Class III+ Rock Garden. The river also passes through scenic canyons and forests, providing a beautiful backdrop for paddlers.

Specific regulations for the area include a permit system for overnight camping and a limit on group sizes. Additionally, visitors are required to pack out all their trash and minimize their impact on the natural environment.