The Whitewater River Run in Colorado begins 0.5 miles upstream from the end of Fern Lake Road and stretches to the eastern boundary of Rocky Mountain National Park. The ideal streamflow range for this run is between 100-500 cubic feet per second (cfs). The segment mileage of the run is approximately 10 miles and has a class rating of III-IV.

There are several specific rapids and obstacles within the Whitewater River Run, including the Entrance Rapid, which is a class IV rapid that requires a technical entry. The next notable rapid is the Narrows, which is a class III rapid that requires precise maneuvering. Other notable rapids include the Pinball rapid, which is a technical class III rapid, and the Plunge, which is a class IV rapid that requires a hard left turn before a steep drop.

There are specific regulations that apply to the Whitewater River Run. For example, all boaters are required to have a personal flotation device and a helmet. In addition, boating is only allowed during daylight hours, and commercial use of the river is prohibited without proper permits. It is important for visitors to be aware of and follow all regulations to ensure the safety of themselves and others on the river.

Overall, the Whitewater River Run is a challenging and exciting whitewater adventure for experienced boaters. Visitors should be prepared for technical rapids, precise maneuvering, and changing river conditions.