The Durango and Silverton Railroad

The Durango & Silverton Narrow Gauge Railroad, often abbreviated as the D&SNG, is a 3 ft (914 mm) narrow-gauge heritage railroad that operates on 45.2 miles (72.7 km) of track between Durango and Silverton, in the U.S. 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 Railroad (D&RG) to transport silver and gold ore mined from the San Juan Mountains. The line was an extension of the D&RG 3 ft (914 mm) 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 between Antonito and Chama, New Mexico in 1970 and operates today as the Cumbres & Toltec Scenic Railroad. Trackage between Chama and Durango was removed by 1971.

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 US 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.

Some rolling stock dates back to the 1880s. Trains operate from Durango to the Cascade Wye in the winter months and Durango–Silverton during the summer months. Durango depot was built in January 1882 and has been preserved in its original form.