The Grant Park Summer Shade Festival takes place every year at the end of August. There is a large artist market, food, live music, 5K and kids zone. For additional family fun, Zoo Atlanta is also in the park if you want to combine destinations into one trip.
The closest MARTA station to the festival is the King Memorial MARTA station on the blue/green rail line. You can walk from the station, but plan on it taking 35 minutes. It can be a fun urban hike (or bring your bike). Sights on the way include Oakland Cemetery, Victorian homes and a number of restaurants.
After exiting the station, keep left and turn left on Grant Street/Hillard. Walk two short blocks to Memorial Drive and turn left again. At Cherokee Avenue turn right (Ria’s Bluebird on the corner). Cherokee will take you straight to the park.
You can also board bus 32 at the Five Points MARTA station.