A Durango & Silverton Narrow Gauge Railroad (D&SNG) steam train crosses a trestle in La Plata County, Colorado

Title, date and keywords based on information provided by the photographer.
The D&SNG operates 45.2 miles of track between Durango and Silverton in southwest Colorado. The route was originally opened in 1882 by the Denver & Rio Grande Railway to transport silver and gold ore mined from the San Juan Mountains. The line has run continuously since 1881, and some rolling stock dates to then. It is now strictly a tourist and heritage line hauling passengers and is one of the few places in the United States that has seen continuous use of steam locomotives. In March 1981, the Denver & Rio Grande Western sold the line, and the D&SNG was formed. Trains operate from Durango just 26 miles into the mountains in winter months and the full 45 miles to Silverton during warmer months.
Credit line: Gates Frontiers Fund Colorado Collection within the Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division.
Gift; Gates Frontiers Fund; 2015; (DLC/PP-2015:068).
Forms part of: Gates Frontiers Fund Colorado Collection within the Carol M. Highsmith Archive.