The attendees came from across the state and Southeast, as well as Canada, the UK, France and other states.
You can read more about it here.
While the wide-spread geography of the fans is impressive, perhaps more impressive is the fact that the event had no backing or support from The CW, which airs the show, or Warner Bros., the show's production company. The studio tour, location tour, hotel arrangements and such were all accomplished through the efforts of one fan from Miami, Fla., ChristyAnne Arancibia [according to the Star-News].
“It was a comment that was made through a live chat we had,” Arancibia said, referring to what gave her the idea for the “One Tree Hill Fan Reunion.”