Grand Teton National Park is an area of impressive scenery and abundant wildlife. The park consists of more than 300,000 acres, including the heart of the Teton Range and most of the valley called Jackson Hole. Grand Teton lies within the Greater Yellowstone Ecosystem, the largest nearly intact natural area remaining in the contiguous United States. Grand Teton and Yellowstone National Parks, seven national forests, and two national wildlife refuges contain millions of acres. Adjoining federal, state, and private lands increase the size of this ecosystem, which is essential to free-roaming wildlife.