The town of Silverton is a Statutory Town that is the county seat of, and the only incorporated municipality in San Juan County, Colorado, United States. Silverton is a former silver mining camp, most or all of which is now included in a federally designated National Historic Landmark District, the Silverton Historic District. The town population reached its nadir at 531 at U.S. Census 2000. It has grown since then.Silverton is linked to Durango by the Durango and Silverton Narrow Gauge Railroad, a National Historic Landmark. Silverton no longer has active mining, but subsists by tourism, maintenance of US 550, mine pollution remediation, and retirees. In 2002 an extreme ski mountain, Silverton Mountain, opened near the town.