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Violette's Lock or Riley's Lock is a whitewater put-in access point on the Potomac River in Montgomery County, Virginia. This location serves paddlers looking to run whitewater sections of the Potomac. The area is situated at coordinates 39.067, -77.329, placing it in the upper Potomac region. As a whitewater-specific put-in, this access point is primarily designed for kayakers and canoeists seeking moving water paddling experiences rather than flatwater recreation.