Department of Environmental Conservation

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Constitution Marsh Audubon Center and Sanctuary

Garrison, Putnam County

View of Constitution Marsh, a marsh wren, and a visitor taking in the view of the marsh

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Constitution Marsh is a 270-acre tidal wetland on the east shore of the Hudson River. It provides foraging, nesting and resting habitat to more than 200 species of birds and 30 species of fish, plus scores of other vertebrate and invertebrate species. The marsh is best experienced via a moderate hike to a 700' boardwalk, which also offers stunning views of the Hudson River Highlands and the United States Military Academy at West Point.

Wildlife to Watch

Where to Watch

  • Lookouts (with seating)
  • Boardwalk
  • Trails
  • Visitor center (aquariums/terrariums)

Recreational Opportunities

(no fees)

  • Trails, some steep and rocky in places
  • Bird Conservation Area kiosk and brochures
  • Visitor center, includes 500-gal. "Hudson River" aquarium and interpretive displays
  • Boardwalk with display panels


270 acres

Closest Town

Cold Spring


See Google Maps and enter your address for step by step directions to Constitution Marsh Audubon Sanctuary (This link will open a page outside of the DEC website. Hold Shift down while clicking on the link to open it in a new window)

Contact Information

Telephone: 845-265-2601

Address: 127 Warren Landing Rd., Garrison, NY 10524

Website: Constitution Marsh Audubon Center & Sanctuary (this link leaves DEC's website)

Photo credits: Eric Lind, Audubon