The Adirondack Park sprawls across six million acres in upstate New York. Bigger than Yellowstone, Yosemite, Glacier and Grand Canyon National Park combined, it is by far the largest park in the lower 48 states. Yet it is the only one on the continent in which large human populations live and whose land is divided almost evenly between protected wilderness and privately owned tracts. This patchwork pattern of land ownership has created an utterly unique place.