This 230-acre glacial outwash basin, located in the southwest part of the island, is considered the birthplace of conservation on Block Island. It was preserved through a 30-year partnership between the Block Island Conservancy, The Nature Conservancy, the Town of New Shoreham, and the Rhode Island Department of Environmental Management.
This preserve has the largest population of the state endangered bushy rockrose in Rhode Island. The hollow's maritime shrubland ecosystem supports bayberry, shadbush and arrowwood. Visit in early to mid-May to see spectacular shad bloom.
The state-threatened northern harrier feeds and nests here, and the only natural population of federally threatened American burying beetles east of the Mississippi lives here.