When millions of people hit the slopes each year at ski resorts throughout the West, they probably don't realize that, nine times out of ten, they're skiing on abandoned mine sites. In this episode we look at the fascinating intersecting history of mining and skiing in the West, and how resorts are handling their past and preparing for their futures today.

Note: When contacted for comment on the case pending against United Park City Mines, the EPA said it does not comment on active litigation.