Studies within Salt Point State Park on the Sonoma County coastline have identified over 100 prehistoric sites including dense shell middens and sparse lithic scatters. It has been suggested that the lithic scatters represent early cultural components and that the shell middens are late. This and other hypotheses regarding paleo-climatic reconstruction, space-time relationships, settlement-subsistence patterns, and interaction and exchange systems are being tested through a phased research program. Preliminary results are reported here.