The Whitewater River Run in Colorado is a thrilling adventure for experienced rafters. The ideal streamflow range for this run is between 1000-3000 cubic feet per second (cfs) which can usually be found in late May through early July. The run is rated as a class III-IV and covers a total of 12 miles from the starting point, which is 0.5 miles upstream from the end of County Hwy 115, to the eastern boundary of Rocky Mountain National Park.

The segment comprises of several rapids and obstacles, including the Pinball, Staircase, Nomad, and The Wall rapids, which require advanced rafting skills. The area is known for its beautiful scenery and wildlife sightings, including elk and bighorn sheep. However, it is essential to note that the area is regulated, and there are specific regulations that must be followed. Some of the regulations include wearing a life jacket, following the designated route, and not littering.

In conclusion, the Whitewater River Run is an exciting and challenging rafting experience for experienced rafters. It is essential to note the ideal streamflow range, class rating, segment mileage, specific river rapids/obstacles, and specific regulations before attempting the run. It is also advisable to seek guidance from experienced guides in the area.