The Annual Black Diamond Days, Gillespie's original festival of coal. Black Diamond Days is a celebration of coal miners and coal mining which has always been a major business in Macoupin County. The festival is held annually for three days each year on the first weekend in June in Gillespie. Gillespie welcomes visitors in a big way with parades, contests, prizes, a carnival, Mine Rescue Demonstration, Fun Run and Five K Run, Arts and Crafts, Concessions and much more.
Gillespie is located nine miles west of Interstate 55 at Exit 52.