If and when the park comes into being, it will be as exciting a moment as the creation of Yellowstone, and because of what it means about our desire not just to protect but to restore the wild. Three million acres is big. The Maine Woods National Park is big hope.
— Bill McKibben
 

Henry David Thoreau called for a "national preserve" in the Maine Woods 150 years ago. RESTORE has proposed for the creation of a new Maine Woods National Park & Preserve worthy of Thoreau's vision — a 3.2-million-acre wildland larger than Yellowstone and Yosemite combined. In 2016, philanthropist Roxanne Quimby and her family generously donated 87,500 acres of land they owned within the proposed park and President Obama designated them as Katahdin Woods and Waters National Monument.