The Oak Mounds is a large prehistoric earthwork mound, and a smaller mound to the west. They are located outside Clarksburg, in Harrison County, West Virginia. These mounds have never been totally excavated but they were probably built between 1 and 1000 CE by the Hopewell culture mound builders, prehistoric indigenous peoples of eastern North America. The larger mound is about 12 feet high and 60 feet in diameter. A number of burials of important persons of the culture probably occurred in these mounds.[1]