D&SNG 478 south navigates through the tight curves on the Horseshoe Curve Highline. Here, the tracks split from the Animas River Canyon and head into the depot at Rockwood.

Slowly crawling along the High Line approaching Rockwood, Colorado, is Durango and Silverton Narrow Gauge train No. 462 on the afternoon of August 14, 2015.

The snow has been coming down hard all morning, but the clouds are lifting a bit as the Durango & Silverton's Cascade Canyon winter train departs Rockwood station.

Durango & Silverton Narrow Gauge Railroad train No. 464 passes through a cut exiting the High Line just west (north) of Rockwood, Colorado, on August 14, 2015.

Durango and Silverton Narrow Gauge train No. 463 crawls along the High Line west (north) of Rockwood, Colorado, on a beautiful August 14, 2015, morning. The off-color water flowing in the Animas i... (more)

Durango and Silverton Narrow Gauge train No. 461 clings to cliff’s edge along the High Line north (timetable west) of Rockwood, Colorado, on the morning of August 14, 2015.

With the Animas River 400 feet below, Durango & Silverton Narrow Gauge train No. 461 crawls along the High Line just north (timetable west) of Rockwood, Colorado, on the morning of August 14, 2015... (more)

Durango and Silverton Narrow Gauge Railroad extra 473 works upgrade along the High Line, 400 feet above the Animas River just north (west in timetable) of Rockwood, Colorado, on the afternoon of A... (more)

A Durango & Silverton train with a K-36 pulling, rounds the curves along the cliffs edge, and above the Animas River near Rockwood, Colorado. Unfortunately, the Animas has an unsavory orange hue t... (more)

Durango and Silverton Narrow Gauge train No. 462 crawls along the High Line approaching Rockwood, Colorado, on August 14, 2015.

Hugging the rocky cliffs, Train 462 snakes its way around Rockwood, Colorado's famous High Line Horseshoe Curve, on its way north to Silverton. Locomotive 480, a Baldwin K-36 Mikado, is j... (more)

Leaving the canyon. Observing the permanent slow order associated with the High Line, DSNG Locomotive 486 brings Train 464 out of the Animas Canyon and the San Juan National Forest, on the ... (more)

A southbound (eastbound) Durango and Silverton Narrow Gauge train crawls along the cliffs above the Animas River on the High Line near Rockwood, Colorado, on August 22, 2003.

The first train of the day to Silverton on August 24, 2003, over the Durango & Silverton Narrow Gauge Railroad snakes along the cliff above Elbert Creek south (east) of Rockwood, Colorado. Mikado ... (more)

A Durango & Silverton Narrow Gauge Railroad track inspector doffs his hard hat as he cruises by mile 468.5 on the way to Rockwood, Colorado, inspecting the track ahead of the first train of the da... (more)