This chapter examines how a child learns to sense and move through a transient environment while recreational cross-country skiing. A mobile video ethnography was undertaken of a parent instructing a novice child on how to ski. Using interactional analysis, the paper examines how snow is sensed, felt and made salient in spatio-interactional practices, and how the snowscape is (re)territorialised by the participants making temporary tracks in the snow. In this way, tracks can shape future mobile actions and immanent pedagogical activities within the practices of cross-country skiing, which inculcate the child's feeling for an ephemeral geography of snow.This chapter investigates the ways in which a child learns to sense and move through a transient environment while recreational cross-country skiing within the context of familial social interaction. A mobile video ethnography was undertaken of family skiing sessions while on a seasonal holiday, in which a parent instructs and guides a novice child on how to ski. Using an interactional mobility analytical approach, the chapter examines how snowa complex, dynamic materiality that can afford spatial movement on its surfaceis sensed, felt and made salient in spatio-interactional practices.In order to analyse the skiers' feeling for snow in this case study, it is important to understand how we sense and experience space and mobility. Spinney (2006) explores the idea that our movements in and through a place define our engagement with it and help to constitute it as a place. In particular, he focuses on the embodied rhythms and kinaesthetic sensations that accompany the movement of cycling. In their study, van Duppen and Spierings (2013) ride along with urban commuter cyclists to discover their everyday, embodied experiences that constitute their diverse personal sensescapes, particularly as manifested in their passage through the city on complete journeys between home and work.Using in-depth interviews with, and photo diaries kept by, ordinary people in inner London, Middleton (2010) explores the sensory, sensual and embodied experiences manifested in urban walking. Others who have examined how we sense space socially and culturally