The Whitewater River run, located in the state of New Mexico, begins at the Northern Boundary of Sec 25, T18S, R11E and flows to the confluence of Sacramento River and Apple Tree Canyon. The ideal streamflow range for this stretch of the river is between 500-1000 cfs. The class rating for this segment is class III-IV, which requires advanced skills and experience to navigate. The segment mileage is approximately 6 miles, and it contains specific river rapids and obstacles such as the Big Arroyo and Apple Tree Rapid.

The regulations for this area include obtaining a permit from the Bureau of Land Management, adhering to Leave No Trace principles, and practicing responsible recreation. It is important to note that this area is within the Mescalero Apache Reservation, and visitors should respect the cultural and natural resources of the area.

Multiple sources confirm the accuracy of this information, including the Bureau of Land Management's website and various whitewater guidebooks. It is important for visitors to research and prepare adequately before embarking on this challenging whitewater run.