Mianus River Gorge (MRG) comprises a 960-acre preserve with over 100 acres of old-growth hemlock forest and the 22-mile Mianus River flowing through it—a unique treasure in the New York metropolitan region. Mianus River Gorge protects and manages over 1,200 acres in the Mianus River Watershed in parts of Bedford, North Castle and Pound Ridge, NY, and Stamford and Greenwich, CT.

Founded in 1953, the Mianus River Gorge, Inc. is an independent 501(c)(3). It was the first land project of The Nature Conservancy and, in 1963, was designated the first National Natural Landmark by the U.S. Department of the Interior. Our mission is to protect irreplaceable natural habitats for our community, wildlife, and future generations.

The Mianus River Gorge Preserve is open seasonally with seven miles of scenic, challenging, and well-tended hiking trails and outdoor exhibits. MRG also owns 41 acres in the Twin Lakes and Taylor Preserves. It provides habitat for hundreds of species of animals, plants, fungi, and microbes in the soil and water.