A recent forum at Weld Hill explored the history, philosophy, and future of the Arboretum’s entrances. A gate is much more than a piece of infrastructure. It’s also an archetype, and an ambivalent one—a portal that’s also a barrier, an impediment masquerading as an entrance. The Arnold Arboretum features nineteen entrances situated around its three-mile perimeter—entryways to the landscape that come in a variety of shapes and sizes, from backyard stiles in Roslindale to the broad, swinging, wrought-iron gates that open on the Arborway and South Street. The Arboretum’s Entrance Improvement Project seeks to renew and improve the Arboretum’s many entrances to provide a safe, accessible, and welcoming experience for all visitors.