Hudson River Reserve, New York

Iona Island Component

Flora (plant life), Fauna (animal life) & Endangered Species Tidal Range & River Flow, & Geology Cultural History

Iona Island is located in the Town of Stony Point in Rockland County, six miles south of West Point.

Iona Island is a bedrock Island in the midst of the Hudson Highlands, bordered to the west and the southwest by Salisbury and Ring Meadows, two large tidal marshes, the mouth of Doddletown Bight, an expanse of shallows and mudflats.

A separate Island, Round Island, was attached to the South end of Iona Island with fill in the early 20th century. The marshes and shallows occupy one mile between Iona Island and the west shore. In addition to being part of the Hudson River National Estuarine Research Reserve, Iona Island and its associated tidal wetlands have been designated a National Natural Landmark by the National Park Service.

The component is comprised of brackish intertidal mudflats, brackish tidal marsh, freshwater tidal marsh and deciduous forested uplands.

Doodletown Brook is the principal tributary to the site, draining approximately 2.9 square miles.

The Iona Island Component encompasses 556 acres.