The Whitewater River Run from Headwaters to Western Private Land Boundary in Section 4, T02S, R30E, Gila and Salt Meridian in Arizona is a thrilling water adventure for experienced paddlers. The ideal streamflow range for this section is between 200 and 600 cubic feet per second (cfs), depending on the season. The class rating for this section is a mix of Class III and IV, with some sections reaching Class V during high water flows. The segment mileage is approximately 7.5 miles, with several challenging rapids and obstacles such as "The Maze," "The Ledge," and "Wall Slammer."

Specific regulations for this area include obtaining a permit from the Bureau of Land Management (BLM) and following all Leave No Trace principles. Additionally, camping is only allowed at designated sites, and fires are only allowed in established fire rings. Visitors should be aware of the potential for flash flooding during monsoon season and take necessary precautions.

Overall, the Whitewater River Run in Arizona is an exciting and challenging river run for experienced paddlers. It offers beautiful scenery and exciting rapids, but visitors should be prepared and follow all regulations to ensure a safe and enjoyable trip.