The Mianus River Gorge is a 755-acre (3.06 km²) nature preserve jointly owned by the Nature Conservancy and the Mianus River Gorge Preserve. It is located in Bedford, New York. The first 60 acres (0.24 km²) were purchased by the Preserve, with help from the Conservancy, their first land preservation deal. It has grown over the years and is still managed by the Preserve.