Narrow Gauge Railroad (D&SNG) is a narrow gauge heritage railroad that operates 45 miles (72 km) of 3 ft (914 mm) track between Durango and Silverton, in the US 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 built between 1881 and 1882, by the Denver
and Rio Grande Railway, in order to carry supplies and people to and silver and gold ore from mines in the San Juan Mountains
. The line was an extension of the D&RG narrow gauge from Antonito
, Colorado to Durango. The last train to operate into Durango from the east was on December 6, 1968. The States of New Mexico
and Colorado purchased 64 miles of the line between Antonito and Chama, New Mexico in 1970 and operates today as the Cumbres and Toltec Scenic Railroad.
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 United States
which has seen continuous use of steam locomotives. In March 1981, the Denver & Rio Grande Western sold the line and the D&SNG was formed.
The Durango & Silverton Narrow Gauge Railroad operates coal-fired steam engines and diesel engines.