The Great Smoky Mountains are part of a national park that runs through different parts of Tennessee and North Carolina. The national park actually has parts that run through the Appalachian Mountains. Many hikers that are going through the Appalachian Trail end up visiting the Great Smoky Mountains. The highest part of the mountains is known as Clingmans Dome. Many hikers like to explore in that area and reach the top, which is known as the Chimney Top.