Durango & Silverton Narrow Gauge Railroad: Steam Along the Animas River

Silverton-Durango steam train winds through the mountains of Colorado

The Durango & Silverton Narrow Gauge Railroad is often described as one of America’s most scenic steam railways. That is true, but it is also not the full story.

What makes this line significant is not just the scenery. It is the fact that it survives as a working remnant of the Denver & Rio Grande system, built in 1882 to serve the silver mines of the San Juan Mountains. The line was never intended as a tourist attraction. It was an economic lifeline.
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That sense of purpose still defines the experience today.

Built for Ore, Not Observation

When construction reached Silverton in 1882, the town was in the midst of a mining boom. The narrow gauge alignment followed the Animas River because it had to. There was no easy way through this terrain. Engineers threaded the track along canyon walls, blasted ledges from rock and constructed timber trestles to maintain a workable gradient.

Unlike the Cumbres route, this line does not climb to a 10,000-foot summit. Instead, it follows the river valley for most of its 45-mile journey, gradually gaining height until it reaches Silverton at 9,305 feet above sea level. The defining feature is the section known as the High Line. Here, the track clings to a narrow shelf cut into sheer rock faces, with the Animas River hundreds of feet below. There are no guardrails and no visual barriers. From the rear gondola, you look straight down into the canyon.
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This alignment exists because it was the only practical route for freight trains carrying ore concentrates, timber and supplies. It remains in use today for the same reason it was built: it works.

Durango and Silverton Train

The Locomotives and the Work

The Durango & Silverton operates coal-fired steam locomotives originally built for the Denver & Rio Grande Western in the early twentieth century. These are K-28 and K-36 class engines, designed specifically for narrow gauge mountain service.

They are not small. A K-36 weighs over 180,000 pounds and was built to haul heavy loads over demanding gradients. On the climb north from Durango, you hear the locomotive settle into a steady rhythm as it works against the grade and curves of the canyon.
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The gondola car at the rear is often the preferred place to ride. It is open-sided, roofed, and allows an unobstructed view of both the locomotive ahead and the river below. You feel the cinders. You smell the coal smoke. It is not a sanitised experience.

Durango Silverton Train in Steam

Silverton: A Mining Town That Survived

Silverton itself is not a reconstructed theme town. It is a community that survived the collapse of large-scale mining in the twentieth century and gradually shifted toward tourism.

Its grid of streets, wooden storefronts and mountain backdrop remain largely intact. When the train arrives, it does so along the same alignment that once brought freight wagons and miners into town. The railway is not an accessory. It is part of the town’s identity.
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Spending time here adds context to the journey. You are not simply travelling through scenery. You are visiting a place that existed because of the railroad.

How It Differs from the Other Railways on the Best of Colorado Tour

It is tempting to compare Durango & Silverton with the Cumbres & Toltec Scenic Railroad, and they do share common roots in the Denver & Rio Grande narrow gauge network. Both operate authentic steam locomotives over original nineteenth-century alignments.

The difference lies in geography. Cumbres & Toltec is defined by sustained climbing over a high mountain pass at more than 10,000 feet. Durango & Silverton, by contrast, follows a river canyon, gaining height gradually while clinging to rock ledges above the Animas.

The contrast with the Pikes Peak Cog Railway is even greater. Pikes Peak was engineered specifically to reach a summit, using a rack system to conquer gradients too steep for conventional adhesion railways. Durango & Silverton, on the other hand, is a traditional freight railroad built to move ore and supplies. It survives not because it was designed as a spectacle, but because its original engineering was sound enough to endure.
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Taken together, the three lines illustrate different responses to the same challenge: how to build and operate railways in the Rocky Mountains.

Within the Best of Colorado Tour

On our Best of Colorado Tour small group tour, Durango & Silverton provides one of the most visually arresting days of the itinerary. It complements the high-altitude engineering of the Pikes Peak Cog Railway and the sustained mountain work of Cumbres & Toltec.

By the time you have experienced all three, a broader picture of Colorado railroading emerges. Narrow gauge construction, mountain alignment, freight heritage and tourism adaptation all sit within the same narrative.

Durango & Silverton is not simply photogenic. It is instructive. It shows how a freight railroad built for silver extraction survived by adapting without losing its operational character.
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For anyone interested in American railway history, that survival story is as compelling as the scenery itself.

View our Best of Colorado itinerary