Average temperatures in Aspen increasing by 3° F, and the number of frost-free days per year increasing by 20 days (25-year trend). At current greenhouse gas emissions trends, the ski season is likely to continue starting later, ending earlier, and losing snow depth until snowpack finally disappears and ends skiing in Aspen and Park City by 2100.

Source: Katzenberger (2006). Climate Change and Aspen: An Assessment of Impacts and Potential Responses. Aspen Global Change Institute.