Field-work in 1984 and 1985 centred on the Klithi rockshelter has combined excavation and analysis of finds with palaeoenvironmental and palaeogeographical studies of the wider regional setting. Radiocarbon dates show that the deposits so far excavated extend from 10,000 BP to 17,000 BP. Excavations have concentrated on the uppermost levels (10,000 BP to 12,500 BP) immediately accessible below the surface, in order to develop methods for investigating spatial variation in the distribution of materials in the deposit. They have revealed a large hearth area in the back of the shelter as a major focus of activity. New details of the flint industry and faunal remains are presented, along with preliminary indications of spatial patterning. There is evidence for the performance of a wide range of subsistence activities based on locally available resources as well as evidence, in the form of exotic flint and marine shells, for contacts over a wide area. Palaeogeographical methods of analysis based on field mapping of geology, relief and terrain have been developed to define the distribution and density of the main herbivores under Pleniglacial conditions. Both the evidence from excavation and from these wider palaeogeographical studies emphasize the small scale of human activities, the small size of residential groups, and the likelihood of seasonal movements and social contacts over very extensive territories during the Upper Palaeolithic period.