As you enter the Arboretum, tell the gatehouse you are headed to the Old Azalea Parking Lot and they can assist you with additional directions
FREE Parking, gravel lot
DO NOT park in the main Arboretum Visitor Center lots. The Old Azalea Parking Lot is 2 miles away from the main lots.
Due to the location of this lot at the far end of Three-Mile Drive, you will want to allow an extra 20 minutes to circumnavigate Three-Mile Drive 10mph traffic conditions.
Alternately, you could also park in the Sensory Garden Parking Lot and walk backwards on Three-Mile Drive to the Old Azalea Parking lot. This will also take about 20 minutes on foot.