The South Section Line run of the Whitewater River in Colorado is a popular destination for whitewater enthusiasts. The ideal streamflow range for this section is between 500-1000 cfs, with the peak season typically being in early summer. It is rated as a Class III-IV run, with an approximate segment mileage of 6 miles.

Some notable rapids and obstacles on this section include Pinball, Upper and Lower Falls, and Sledgehammer. Pinball is a technical rapid with several rocks and tight turns, while Upper and Lower Falls are steep drops that require precise navigation. Sledgehammer is a powerful hydraulic that can swamp rafts and kayaks if not approached with caution.

There are specific regulations that apply to this section of the river, including a permit requirement for commercial guiding operations and a prohibition on camping within 200 feet of the riverbank. It is also important to note that this section of the river is subject to seasonal closures, so it is important to check with local authorities before planning a trip.