The third and final report in a series describes the results of archaeological research at Lake Fork Reservoir. The Reservoir is a 30, 000 acre lake being constructed in Wood, Rains, and Hopkins counties, Northeast Texas. Extensive testing of nine sites is discussed and the analyses of lithic and ceramic artifacts, floral and faunal remains, and locational data from intra-site and inter-site perspectives are presented. These analyses are used to devise four cultural phases for the Reservoir prehistory, and settlement patterns of each phase are discussed in detail. A model of change in settlement pattems and overall prehistoric adaptation through time is presented. -- AATA