Abstract: This work explores how Mapuche social memory expands understanding of Indigenous territoriality based on mobility in the southern Andes borderland. Social memory offers historically meaningful and rich insights into understanding Indigenous territorial demands and environmental conflicts rooted in settler colonialism. I underline the importance of examining Mapuche memories through historical routes in the Trankura Valley of Chile, located in the southern Andes Mountains, for two reasons: First, Mapuche narratives about mobility question visions of authenticity based on static and ahistorical ideas of an Indigenous community confined in land enclosures. Second, studying Mapuche routes opens possibilities for mapping Mapuche territorialities beyond nation-state narratives and settler colonial spatial formations that have historically disrupted Indigenous land relations. Therefore, this work considers the importance of historical and critical analysis of Mapuche mobility as constellations to expand debates about Indigenous sovereignty and environmental justice on the Andes borderlands.