This article examines how notions of “material” and “materiality” were infused, both technically and discursively, into American landscape painting in the late nineteenth century. Focusing particularly on the praxis of open-air painting as consolidating a new mode in landscape painting as well as a new artistic identity, this article argues that painting outdoors was perceived by artists in terms of agency, uniting painter, painting, and landscape; but unlike earlier romantic or Transcendentalist approaches, this idea was not conceived of as a solely spiritual union but, rather, as a mode that is embedded in the mundane, in the existence of objects, of embodied engagement and material means. The overt affinity between the basic idea of the praxis—painting outdoors in ‘real’ nature—and material aspects of art-making, is discussed as the underpinning of a new emerging episteme of American landscape painting, while considering the environment wherein this phenomenon was cultivated within a specific moment in American culture. Paintings and texts, generated by American painters and critics between the late 1870s and the 1890s, are read in this article through the lens of recent theoretical phenomenological approaches to landscape, illuminating the unique role that materiality played in these representations. Moreover, tying the findings to the changing conceptions of both landscape and art in the Gilded Age, the article concludes that landscape painters of the ‘new generation’ sought to evade commodifying tendencies of image-making by deliberately engaging with materiality, devising a mode of landscape representation that would not succumb to the flattening steamroller of capitalist consumer culture.