TWA in-flight menu cover by David Klein. The Durango and Silverton Narrow Gauge Railroad, often abbreviated as the D&SNG, is a 3 ft  narrow-gauge heritage railroad that operates on 45.2 miles of track between Durango and Silverton, in the U.S. state of Colorado.

The railway is a federally-designated National Historic Landmark and was also designated by the American Society of Civil Engineers as a National Historic Civil Engineering Landmark in 1968. The route was originally opened in 1882 by the Denver and Rio Grande Western Railroad (D&RGW) 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

Courtesy Private Collection.