Slow Tourism, a new trend that originated in Italy, is now traversing the globe. This study traces its evolution, synthesizes existing definitions, and develops a conceptual model for the stages of Slow Tourism development. It uses a qualitative, exploratory framework situated in the paradigms of constructivism and critical theory and a critical, interpretative form of inquiry and analysis. Data sources included various types of secondary data as well as primary data collected during personal interviews conducted in November of 2010 with key leaders in the first two CittaSlow designated cities in the U.S. Findings suggest that Slow Tourism, which can occur in both rural and urban settings, is an outgrowth of the Slow Food Movement and is tied to CittaSlow through the explicit guarantee of unique slowness offered by these officially designated cities. The presence of Slow Food Convivia, a critical mass of CittaSlow designated cities, and practices of socio-political consumption emerged as important stages in its development.