The Black Hills of South Dakota are a geologic anomaly in the United States. The Black Hills (Pahá Sápa in Lakota, Moʼȯhta-voʼhonáaeva in Cheyenne, awaxaawi shiibisha in Hidatsa) are a small, isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, USA. Harney Peak, which rises to 7,244 feet (2,208 m), is the range's highest summit. The Black Hills encompass the Black Hills National Forest and are home to the tallest peaks of continental North America east of the Rockies. The name "Black Hills" is a translation of the Lakota Pahá Sápa. The hills were so-called because of their dark appearance from a distance, as they were covered in trees.