Recreation and Historic Preservation, Taconic region Open Space Institute Orange County Land Trust Palisades Interstate Park Commission Bear Mountain State Park Harriman State Park Minnewaska State Park Preserve Rivers and Trails Coalition Shawangunk Ridge Coalition Sierra Club, New Jersey Chapter Sterling Forest Partnership Teatown Lake Reservation The Nature Conservancy United States Forest Service See also Sustainability Biodiversity Ecology Earth Science Natural environment Nature References External links Environmental organizations based in New Jersey Hiking organizations in the United States Palisades Interstate Park system Ramapos Appalachian Trail Mahwah, New Jersey Environmental organizations based in New York (state) 1920 establishments in New York (state)