The Great SMOKY Mountains are a mountain range located along the Tennessee-North Carolina border in the southeastern United States. The range is part of the Appalachian Mountains and is one of the oldest mountain ranges in the world, with some peaks reaching elevations of over 6, 000 feet. The range is home to a wide variety of wildlife and plant species, and is a popular destination for hikers and outdoor enthusiasts. The Great SMOKY Mountains National Park, established in 1934, is the most visited national park in the United States.