[1] The railroad line was closed by the D&RGW in 1968 and much of the narrow gauge trackage has since been abandoned.

A surviving portion of the narrow gauge track in the route is the 64 miles (103 km) long Cumbres & Toltec Scenic Railroad between Antonito and Chama which calls its westbound train the Colorado Limited and its eastbound train the New Mexico Express.

The line from Antonito to Alamosa is now standard gauge only and belongs to the San Luis and Rio Grande Railroad.

One of the most frequently used locomotives on this route was and still is the steam wheel arrangement K-36 2-8-2 "Mikado" type.

The line from Antonito to Alamosa is now standard gauge only and belongs to the San Luis and Rio Grande Railroad.