Between 1967 and 1975 archaeologists from SUNY-Buffalo led a multidisciplinary project in the Marismas Nacionales, a vast, resource-rich estuary and mangrove forest of coastal Sinaloa and Nayarit, west Mexico. Michael Foster and fellow archaeologists provide a much-needed synthesis of these investigations, drawing from previously unpublished data and published reports to provide a comprehensive look at the region.