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Dedicated to the protection, enjoyment, and
understanding of the outdoors
We protect the mountains, forests, waters, and trails of the Northeast and Mid-Atlantic regions through hands-on stewardship, scientific research, and public policy advocacy. Our staff and volunteers maintain and build more than 1,800 miles of trails on the East Coast, including segments of the Appalachian Trail.
We advocate for land and water conservation, research environmental issues, and work with local and national policymakers to protect the outdoors. We believe that environmental protection must be driven by science. Our conservation team produces high-quality, peer-reviewed data and analysis on climate change.