Clearly, from the celestial alignment at Pilot Mountain this would have been a grand ceremony spot throughout the year. The NC Park Service has published that there are also highly significant pre-historic burials at Pilot Mountain to add fuel to that statement.
It is said the very first mound was natural. Within the mound culture coming upon Pilot Mountain on the Great Warrior Path would had a profound effect since it is over 1,400 feet tall (very much in dispute right now).