The Durango & Silverton Narrow Gauge Railroad (D&SNG) is a 3 ft narrow-gauge heritage railroad that operates 45.2 miles of track between Durango and Silverton, in the state of Colorado. The railway is a federally designated National Historic Landmark and is also designated by the American Society of Civil Engineers as a Historic Civil Engineering Landmark. The route was originally opened in 1882 by the Denver & Rio Grande Railway (D&RG) to transport silver and gold ore mined from the San Juan Mountains. The line from Durango to Silverton has run continuously since 1881, although it is now a tourist and heritage line hauling passengers, and is one of the few places in the U.S. which has seen continuous use of steam locomotives.— Wikipedia
