Some locomotives get preserved because a museum decides they’re worth saving. No. 484 survived because two states decided an entire 64-mile stretch of railroad was worth saving, and this engine came along with it as part of that larger, deliberate act of preservation. Today it’s one of only two coal-fired K-36 Mikados still doing regular work, climbing over one of the highest points reached by any regularly operating steam locomotive in the country.
No. 484 is a K-36 class 2-8-2 “Mikado” locomotive built by Baldwin Locomotive Works in 1925 for the Denver and Rio Grande Western Railroad. Unlike the lighter, faster K-28 “Sport Models” built two years earlier for passenger work, the K-36 class was designed for heavy freight and passenger service on the D&RGW’s 3-foot narrow gauge network across Colorado and New Mexico.
That heavier build shows up in the numbers: roughly 187,100 pounds class weight, 36,200 pounds of tractive effort, 195 psi boiler pressure, and 44 inch drivers. No. 484 worked routes including the Monarch Branch and the demanding line over Cumbres Pass between Alamosa and Chama, exactly the kind of steep, high-altitude grades that a heavy Mikado design was built to handle.
Baldwin built the K-36 class two years after the lighter K-28s went to the same railroad, and the difference in mission shows in how each class was deployed. Where the K-28s ran premier passenger trains that prized speed, the K-36s like No. 484 were the workhorses assigned to routes that demanded raw pulling power over elevation change, branch lines like the Monarch Branch and the grueling climb toward Cumbres Pass. That’s a distinction that still matters today: the K-36 hauling excursion trains over Cumbres Pass is doing essentially the same category of work, heavy haulage over a serious mountain grade, that it was purpose-built for a century ago.
As the D&RGW progressively dieselized through the 1950s and 1960s, steam power like No. 484 became increasingly redundant on an operating railroad focused on modern equipment. Rather than disappearing into scrap, though, the locomotive’s fate took a different turn in 1970, when the states of Colorado and New Mexico jointly purchased the 64-mile Antonito-to-Chama segment of the line specifically to preserve it as a heritage tourist railroad. That purchase formed the Cumbres and Toltec Scenic Railroad, and No. 484 was among the locomotives transferred to the new roster.
The engine was restored to operating condition in 1971, and it has remained one of the C&TS’s active excursion locomotives ever since, hauling tourist trains over the dramatic 10,015-foot Cumbres Pass and through the Toltec Gorge. That’s a genuinely rare combination: continuous operation on the same physical line it originally worked, now under state ownership rather than a private railroad, and still burning coal the way it always did.
Compare No. 484’s numbers to its lighter K-28 cousins and the difference in purpose becomes obvious. At a class weight of roughly 187,100 pounds and 36,200 pounds of tractive effort, the K-36 design significantly outmuscles the K-28 “Sport Models,” even though both classes share the same 2-8-2 Mikado wheel arrangement, 3 foot narrow gauge, and 44 inch drivers. That extra pulling power at 195 psi boiler pressure is exactly what heavy freight and mixed passenger service over Cumbres Pass demanded. This is a mountain grade that climbs to 10,015 feet, one of the highest points reached by any regularly operating steam locomotive in North America, and a locomotive working that route needs the kind of low-speed muscle the K-36 class was built to provide. No. 484’s continued coal firing also means its crews are still working with the original fuel and firing technique the class was designed around, rather than the oil conversions most other heritage steam operations, including sister K-28 No. 473 just across the state line, have adopted.
No. 484 is based in Chama, New Mexico, jointly owned by the states of Colorado and New Mexico, and remains in operational excursion service. Along with No. 488, it is one of the last two coal-fired K-36 locomotives still in regular operating service anywhere. That distinction is worth sitting with for a moment: most heritage steam operations today have converted to oil firing for practical and environmental reasons, so a coal-fired K-36 climbing Cumbres Pass is an increasingly rare sight in American railroading.
You can see the full spec sheet for Cumbres & Toltec Scenic No. 484 here, including its complete build and service history.
No. 484’s story is really the story of an entire line surviving intact rather than piecemeal. A lot of preserved steam locomotives ended up disconnected from their original routes, sold off to museums or tourist operations far from where they actually worked. No. 484 is still running over the same Cumbres Pass grade it worked for the Denver and Rio Grande Western, on rail the states of Colorado and New Mexico deliberately chose to keep intact in 1970 rather than let it be abandoned or torn up.
The coal-firing detail matters too, and not just as a curiosity. Operating a coal-fired steam locomotive today requires maintaining a whole supply chain and skill set, from coal sourcing to the specific firing techniques a crew needs to keep the boiler at pressure over a demanding mountain grade, that most heritage railroads have moved away from. No. 484 and No. 488 keeping that tradition alive means Cumbres Pass remains one of the last places in the country where you can experience narrow gauge steam railroading essentially as it operated in the mid-20th century, sound, smoke, and all. That’s a direct result of the 1970 decision by Colorado and New Mexico to buy the line outright rather than let it be dismantled, a choice that preserved not just a locomotive but an entire operating environment around it.
What is a K-36 class locomotive?
The K-36 class was a group of heavy 2-8-2 Mikado narrow gauge locomotives built by Baldwin for the Denver and Rio Grande Western Railroad, designed for heavy freight and passenger service, unlike the lighter K-28 “Sport Model” class.
How did No. 484 end up on the Cumbres and Toltec Scenic Railroad?
In 1970, the states of Colorado and New Mexico jointly purchased the 64-mile Antonito-to-Chama segment of the D&RGW’s narrow gauge line to preserve it as a heritage railroad, forming the Cumbres and Toltec Scenic Railroad. No. 484 was transferred to the new roster and restored to operating condition in 1971.
Is No. 484 still coal fired?
Yes. Along with No. 488, it is one of the last two coal-fired K-36 locomotives still in regular operating service.
What route does No. 484 run today?
It hauls excursion trains over the 10,015-foot Cumbres Pass and through the Toltec Gorge between Chama, New Mexico and Antonito, Colorado.
How does the K-36 class compare to the K-28 class?
The K-36 class, which includes No. 484, was heavier and more powerful than the K-28 “Sport Model” class, built for heavy freight and passenger service rather than fast express passenger runs, with a class weight of about 187,100 pounds versus the K-28’s lighter build.