This chapter revisits, through the lens of biopolitics and physical culture, the dissemination of garden city movement principles in the United States in the early twentieth century. It focuses on the support and planning ideas of the Regional Planning Association of America (RPAA), a small group of architects, planners, and social thinkers who are cited as perhaps the most significant example of the impact of the garden city movement on town planning in the US. The chapter studies the biopolitical impulses of the RPAA and their advocacy of garden cities, with attention to the links between the RPAA’s garden city ambitions and their understandings of what constituted spaces for healthy recreation. The chapter argues that the biopolitical and physical cultural underpinnings of the RPAA can be gleaned in part through their support of redeveloping entire regions and seeing the creation of garden cities as complementary to the creation of opportunities for recreation in preserved “wilderness” areas via the Appalachian Trail.