Hudson River Valley Special Resource Study Act - Directs the Secretary of the Interior to conduct a study of the Hudson River Valley in the state of New York to evaluate: (1) the national significance of the part of the Hudson River that flows from Rodgers Island at Fort Edward to the southernmost boundary of Westchester County, New York (the study area); and (2) the suitability and feasibility of designating the study area as a unit of the National Park System.