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Hudson River National Estuarine Research Reserve

A part of Tivoli Bay with water and vegetation
Tivoli Bays are one of the four tidal wetlands
protected by the Hudson River Research Reserve

Four distinct tidal wetland sites on the Hudson River Estuary were designated the Hudson River National Estuarine Research Reserve in 1982 as field laboratories for estuarine research, stewardship and education. They are part of the National Estuarine Research Reserve System, which now includes 28 reserves in 22 states and Puerto Rico. The Reserve is operated as a partnership between the New York State Department of Environmental Conservation and the National Oceanic and Atmospheric Administration (NOAA) and relates to federally-designated and state-protected sites along 100 miles of the Estuary.

Nearly 5,000 acres of tidal wetlands and nearby land represent the diverse plant and animal communities of the Hudson Estuary at four sites: Stockport Flats in Columbia County, Tivoli Bays in Dutchess County, and Piermont Marsh and Iona Island in Rockland County. Download the map of Hudson River Research Reserve sites (PDF) (4.8 MB) to see where each wetland is along the Hudson River estuary.

Reserve staff and partners conduct estuarine research studies of physical, biological and chemical characterizations; ecosystem processes; and exchanges between wetlands and the Hudson's main stem. Research provides a solid foundation for all reserve programs in education, outreach, training, stewardship and restoration.

The Reserve holds many public events and workshops. Education and outreach include guided canoe programs, lectures, interpretive exhibits and community events for the general public; information and training sessions for coastal decision makers; workshops for teachers; and field-based programs for middle school, high school, and post-secondary students.

Cover of the Hudson River National Estuarine Research Reserve Management Plan

The 2019 Hudson River Research Reserve Draft Management Plan (PDF) (5.8 MB) provides a framework to guide the Reserve's direction and activities. This plan is an update of the 2009 Management Plan (PDF) (6 MB), and will guide the management of the Research Reserve for the next five years. It provides a foundation for education programs, professional training, research, public access, and resource stewardship.


More about Hudson River National Estuarine Research Reserve:

  • Visit the Reserve - The Hudson River Research Reserve headquarters are at the Norrie Point Environmental Center, and four tidal wetlands serve as field research sites: Stockport Flats, Tivoli Bays, Piermont Marsh and Iona Island.
  • Research - The Research program of the Hudson River National Estuarine Research Reserve monitors physical, biological, and chemical processes of the Hudson River estuary.
  • Education Programs - Free public canoe programs, field-based Hudson River Estuary education for middle school and high school, fish seining events, and more are offered by the NYSDEC Hudson River Research Reserve.
  • Hudson River Sustainable Shorelines - The Sustainable Shorelines Project provides science based information for shoreline management that balances habitat protection and human use.