Before 1780, Grigsby's Bluff, specifically that part of Port Neches immediately east of Port Neches Park, had been a Native American town for at least 1,500 years, at first of the Karankawa tribe, whose 7 feet skeletons were often found in the burial mounds there; and after 1650 of the Nacazils, a sub-tribe of the Attakapas, who were a short and stocky people before their extinction about 1780.