This article examines the 1928 German–Soviet Alai–Pamir expedition as a moment when different scientific traditions, political ambitions and bodily practices met in the high-altitude borderlands of Central Asia. Focusing on the mapping of the Fedchenko glacier, it argues that knowledge emerged not simply from instruments and protocols, but from the difficult encounter between bodies, technical tools and a resistant glacial landscape. The glacier thus became more than a physical object of study; it was an epistemologically charged terrain where ways of knowing were tested and made visible. German scientists, drawing on alpine traditions of glaciology, emphasized precision, discipline and methodological control. Soviet participants, by contrast, highlighted endurance, improvisation and collective struggle, casting physical hardship as proof of revolutionary commitment and shaping a distinctly ideological form of scientific masculinity. By tracing these entanglements of body, landscape and ideology, the article presents the expedition as an example of how science operates not only as a cognitive project, but also as a deeply embodied and politicized practice.