Department of Environmental Conservation

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Mashomack Preserve

Shelter Island, Suffolk Co.

Images of Mashomack Preserve: marshes,osprey landing on nest and coastal forest

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Edged by 10 miles of coastline, Mashomack Preserve on Shelter Island is just 90 miles from New York city and encompasses tidal creeks, mature oak woodlands, fields and freshwater and saltwater marshes. From pristine shores, watch osprey dive for fish. Nearly 200 bird species, including endangered piping plover and least tern, have been recorded.

Wildlife to Watch

Where to Watch

  • Beaches, fresh and saltwater marshes
  • Glacial kettle holes, tidal creeks and pools
  • Forests, scrub, fields

Recreational Opportunities

  • Visitor center with exhibits and interpretive programs, as well as restrooms and parking
  • More than 20 miles of hiking trails, with overlooks and observation shelters, and one water trail
  • Birdwatching - more than 200 species of birds have been recorded at the preserve

Accessible Features

The visitor center includes exhibits with universal access along with fully accessible public restrooms, and an accessible trail is located close to the visitor center. A full list of DEC's accessible recreation destinations is available on the DEC website.


2,039 acres

Nearest Town

Shelter Island


See Google Maps and enter your address for step by step directions to Mashomack Preserve (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

Address: 79 South Ferry Road, Shelter Island, NY 11964
Telephone: 631-749-1001
Website: The Nature Conservancy - Mashomack Preserve (leaves DEC website)

Photo Credits: Ed Sambolin, The Nature Conservancy, Susan L. Shafer