The Dixie Highway Yard Sale runs along old Highway 41 from Ringold, Georgia to Marietta, Georgia along the old two lane Highway 41. The event is held the first weekend in June. This year, 2012, that will be June 1st through June 3rd. The weekend after Memorial Day.
I have set up just south of Calhoun the last two years. The results were very good. While there are many good spots on this celebration of the old byway my favorite is the stretch between Adairsville and Calhoun. A service road at the Airport south of Calhoun runs parallel to a section of the road and is always full of vendors. Reseca at the Highway 136 crossing has been another hot spot in years past. Many of the shops along the route in Calhoun run sidewalk sales in conjunction with the Dixie Highway Yard Sale. I would also expect to see a lot of activity at any flea market along or near the highway
You can find more information at the Dixie Highway Yard Sale FaceBook page.