The Durango & Silverton operates something over 40 passenger cars of various types. About half are enclosed coaches, with another 17 open gondolas, four private first-class cars, four concession cars, and two home-built glass-topped open observation cars.
Here are photos of nearly all the cars. The car roster is actually something of a moving target, what with ongoing restorations and the occasional renaming of cars.
(See Wikipedia for more details)