From Atlanta:

Take I-75 North to exit 268.  Follow I-575 N (Hwy 5/US 76/Hwy 515) through Jasper, Ellijay, Blue Ridge, and Blairsville to Young Harris. YHC will be on the right. (easiest way)

From I-85 North:  

Take I-985/Hwy 365, left on Hwy 52 to US 129 North to Cleveland, Hwy 75 North through Helen, US 76 West through Hiawassee to Young Harris. YHC will be on the left.

From GA 400 N:

Continue to the end, go straight ahead on two-lane county road (Longbranch Rd.) and right on Hwy 52/115 to Cleveland, Hwy 75 North through Helen, US 76 West through Hiawassee to Young Harris. YHC will be on the left.