The Whitewater River Run from Lee's Ferry to the confluence with Nankoweap Creek in Arizona is a popular stretch of the Colorado River for white water rafting enthusiasts. The ideal streamflow range for this section of the river is between 8,000 and 25,000 cubic feet per second (cfs).

This section of the river is rated as a Class III-IV rapid, which means that it has moderate to difficult rapids with some obstacles to navigate. The segment mileage of this run is approximately 88 miles long, taking around 7-10 days to complete.

Some of the specific river rapids and obstacles on this run include the Hance Rapid, Granite Rapid, and the Crystal Rapid. These rapids are known for their technical difficulty and require experienced rafters to navigate. The river also has some calm stretches where rafters can enjoy the scenic beauty of the area.

Specific regulations to the area include obtaining a permit from the National Park Service to raft this section of the river. There are also regulations on camping and waste management, as this area is part of the Grand Canyon National Park.

In conclusion, the Whitewater River Run from Lee's Ferry to the confluence with Nankoweap Creek in Arizona is a challenging and scenic stretch of the Colorado River. With its ideal streamflow range, class rating, segment mileage, specific river rapids and obstacles, and regulations to the area, this run is a must-do for experienced white water rafters.