The Mesolithic of this region of Northern Italy is known through faunal remains and lithic material found within rockshelters and at open-air hunting camps and processing sites. This report provides a synthesis of the material and uses risk-based models to assess long-term spatial and temporal changes from the Late Mesolithic to the Early Neolithic. These models assess the efficiency of tools for hunting and processing food, and the dietary and nutritional requirements implicit in subsistence changes.