Rim of the Valley Corridor Preservation Act This bill adjusts the boundary of the Santa Monica Mountains National Recreation Area in California as depicted on a specified map to include the Rim of the Valley Unit. The Rim of the Valley Unit, and any lands or interests acquired by the United States and located within its boundaries, shall be administered as part of the recreation area. The Department of the Interior may acquire only through exchange, donation, or purchase from a willing seller any nonfederal land within the boundaries of the Rim of the Valley Unit.