Mountain ranges are the primary source of global sediment and hotspots of geohazards. In their high-altitude, alpine regions, climate change is accelerating erosion and landslide activity due to rapid post-glacial landscape adjustment and permafrost degradation. While most current observations of these processes span just a few years or decades, there is an urgent need to understand how these dynamics unfold over much longer timescales (102-104 years) to quantify the impact of present, past and future glacial-interglacial climate changes.