The train engine & cars depart Silverton, Colorado, USA. The Durango and Silverton Narrow Gauge Railroad, a National Historic Landmark, links Durango to Silverton, in Colorado, USA. Silverton is a former silver mining camp, now the federally-designated Silverton Historic District. Silverton no longer has active mining, but subsists on tourism, maintenance of US 550 (which links Montrose with Durango), mine pollution remediation, and retirees.