Durango and Silverton Narrow Gauge steam locomotive D&RGW 473 leads a K-28 100th Anniversary Special through the Repeating Curves at MP 472.2, along the Animas River, between Durango and Silverton, Colorado, on October 16th, 2023.

According to Wikipedia: The Durango and 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 mi (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 was also designated by the American Society of Civil Engineers as a National Historic Civil Engineering Landmark in 1968.

Tech Info: Nikon D810, RAW, Sigma 24-70 @ 70mm, f/5.6, 1/1000, ISO 80.