Pa Mac's Caddo Gap Heritage Festival ,in Caddo Gap, Arkansas, is one of southwest Arkansas’ most unique festivals. Dedicated to preserving the old ways of life in and around the Ouachita Mountains and foothills region, this festival is a day of family-friendly fun for all ages, free to the public each year on the first Saturday of October at the historic Gap Mercantile, 35 Vaught Street in Caddo Gap, Arkansas.