Durango and Silverton Narrow Gauge Railroad

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 mi 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 to transport silver and gold ore mined from the San Juan Mountains. The line was an extension of the D&RG 3 ft narrow-gauge line 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 track between Antonito and Chama, New Mexico, in 1970, which is operated today as the Cumbres and Toltec Scenic Railroad. Trackage between Chama and Durango was removed by 1971.

Source: Wikipedia