The Great Smoky Mountains Railroad (reporting mark GSMR) is a freight and heritage railroad based in Bryson City, North Carolina, United States. Since late 1999, the railroad is currently owned and operated by American Heritage Railways, Inc., which also owns and operates the Durango and Silverton Narrow Gauge Railroad (D&SNG) in Colorado. The railroad operates excursion trains on the former Southern Railway Murphy branch line between Dillsboro and Nantahala, North Carolina. Since then, the GSMR became one of the most popular tourist railroads in the United States, with about 200,000 passengers each year.