The official Appalachian Trail Conservancy 12" x 12" wall calendar for 2021 features professional photography by users of the Trail. The captions include interpretive information about the Trail and points of natural and cultural history protected within its corridor by ATC and more than 6,000 volunteer maintainers in local clubs. This year's cover features the "green tunnel" through the Berkshires of western Massachusetts.
The dates grid is as large as possible at this size and appears atop a schematic locator map in the background for the image. The map pinpoints each location along the trail. Copublished by ATC and Rizzoli International/Universe Publishing since 2011.