The Hudson River Restoration Study Area follows the shores of the Hudson River starting at Piermont Marsh (river mile 23) located at the southern edge of the Village of Piermont on the west shore of the Governor Mario M. Cuomo Bridge to the northern inland extent of the tidal Hudson River at the Troy Federal Lock and Dam, river mile 152.
The boundary includes the estuarine and tidal freshwater portions of the Hudson River, including all riverine, open water, and tidal wetlands in this stretch of the river as well as adjoining floodplains, uplands and non-tidal wetlands and immediately adjacent uplands. Upland forested areas may be included so much as they provide necessary buffer for aquatic ecosystem restoration sustainability.
The study area also includes the lower portion of major tributaries and floodplains that drain into the Hudson River proper.