The Durango & Silverton Railroad is world famous and runs in the mountains of Colorado. This line was operated until the Seventies by the Denver & Rio Grande Railroad. It was then sold and it continued to be run as a pure tourist railroad. Although it is a narrow gauge railroad with a gauge of 3 feet (914 mm), the locomotives and cars do not need to shy away from a comparison with European standard gauge locomotives and cars. Trains with up to 10 of the famous yellow old-timer cars are the rule rather than the exception. These cars are also in dark red and dark green paint schemes – chiefly for special services and historic trains. The dark red cars also have a name in in addition to the car number.