LOLOL The park had to close the gates because of the crowds.
ATLANTA
Stone Mountain Park reached its capacity as of 6:15 p.m. Saturday.
Park officials said they would not be allowing any other guests into the park. Gates remained closed the rest of the night.
http://www.wsbtv.com/news/news/local/stone-mountain-park-capacity-july-4/nmrmN/
The capacity has be in the 10’s of thousands. I’ve been to a concert at the outdoor campground there that was attended by over 12,000.