Mountain passes have played a key role in past mobility, facilitating transhumance, intra-regional travel and long-distance exchange. Current global warming has revealed an example of such a pass at Lendbreen, Norway. Artefacts exposed by the melting ice indicate usage from c. AD 300-1500, with a peak in activity c. AD 1000 during the Viking Age-a time of increased mobility, political centralisation and growing trade and urbanisation in Northern Europe. Lendbreen provides new information concerning the socio-economic factors that influenced highelevation travel, and increases our understanding of the role of mountain passes in inter-and intraregional communication and exchange.