The Whitewater River Run from Fdr 631 to Indian Creek in Colorado is a popular destination for whitewater enthusiasts. The ideal streamflow range for this segment is between 300 and 800 cubic feet per second (cfs), which offers exciting rapids while still being safe for experienced paddlers. The class rating of this segment ranges from class III to IV, with some challenging rapids like "Hell Hole" and "Pinball."

The total segment mileage of the Whitewater River Run is approximately 10 miles, and it typically takes around 3-4 hours to complete. Some notable rapids and obstacles along the way include "Entrance Exam," "Paddle Bitch," "Sledgehammer," and "Jaws." There are also some scenic spots along the river, like Indian Peaks Wilderness and the Arapaho National Recreation Area.

As for regulations, all boaters are required to have a personal flotation device (PFD) and a whistle. Commercial outfitters must have a permit to operate in the area. Additionally, it is important to respect private property along the river and properly dispose of all trash.