Pine Mountain is an unincorporated community located in eastern Rabun County, Georgia, United States, at an elevation of 1611 feet. It is one of only two Georgia communities located north of South Carolina (the other is the city of Sky Valley), due to a quirk of geography: the Chattooga River is the primary tributary of the Savannah River and Tugalo River specified in the 1787 Treaty of Beaufort, but runs perpendicular to them.