 The Chickasaw Nation, which runs , promotes the idea of Chickasaw Country as the 13 south-central Oklahoma counties that comprise the Chickasaw Nation, being the Tourism Department’s seven counties plus Coal, Bryan, Jefferson, Stephens, Grady, and McClain counties.The region, also known by its former Oklahoma Department of Tourism designation, Arbuckle Country or Lake and Trail Country, has three distinct centers of commerce and culture, Ardmore, Ada and Durant, though it retains a largely rural nature, and is populated with many small towns and ranches.It also contains a large portion of the Cross Timbers region, transitioning from a heavily wooded area (with native oaks, elms and other eastern varieties) to a rolling savanna in the west, occasionally broken by cedar and mesquite trees.