The Whitewater River Run starts below the tailrace of the Rainbow Dam and ends at the confluence with the Connecticut River in Connecticut. The ideal streamflow range for this run is between 300 to 1000 cubic feet per second (cfs). This is a class III to IV rated run with a segment mileage of 3.5 miles. The river features several challenging rapids, including the Pillow Rock, which is a class IV rapid, and the Hole in the Wall, which is a class III rapid. Other notable rapids include the Cribworks, a series of ledges and drops that are a class III to IV, and the Rollercoaster, a class III rapid.

The Whitewater River Run is regulated by the State of Connecticut. Anyone operating a watercraft on the river must comply with all state and local regulations. Additionally, there are specific regulations to the area, including a restriction on camping within 100 feet of the riverbank. The area is also subject to seasonal restrictions, and visitors are advised to check for closures or other restrictions before planning a trip.

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