Eastern National is the park's cooperating association. Eastern National provides quality educational products and services to the visitors to America's national parks and other public trusts. The association's contributions have benefited parks and visitors by supporting research, educational, and interpretive projects and by funding publications.

Joining Eastern National supports your parks and gives you a 15% discount on merchandise in any Eastern National store. Here at Acadia, Eastern National manages the bookstore at Hulls Cove Visitor Center, the Nature Center, Islesford Museum, Blackwoods and Seawall Campgrounds, and park headquarters.

To join, pick up an application at a park bookstore or visit the Eastern National website.