10/01/2026
Black Rock Mountain State Park is Rabun County’s pride and joy!
🌄 Two raindrops can land three feet apart up here and end up in different oceans.
Black Rock Mountain State Park sits above Mountain City in Rabun County, and at 3,640 feet it is the highest state park in Georgia. The dark cliffs that gave it the name are biotite gneiss, a metamorphic rock that runs under a big part of the Georgia Blue Ridge.
Here is the part almost nobody mentions. The park straddles the Eastern Continental Divide. Rain falling on the eastern slope works its way into the Savannah River system and out to the Atlantic. Rain falling a few steps west goes into the Little Tennessee, then the Tennessee, then the Ohio, then the Mississippi, and finally the Gulf. Same cloud, same minute, two completely different endings. The 2.2 mile Tennessee Rock Trail walks that line for part of its length, so you can stand with one foot on each side of the split.
On a clear day the overlooks give you about eighty miles of southern Appalachians and four states at once: Georgia, North Carolina, South Carolina and Tennessee. Four more peaks inside the park top 3,000 feet.
It almost did not happen. A Rabun County man named John V. Arrendale started buying pieces of the mountain in 1938, beginning with seventy acres, and kept at it for years. The state park opened in 1952 with about a thousand acres. It covers roughly 1,743 today.
Have you ever stood on a ridge and realized the water at your feet was headed somewhere completely different than the water behind you?
Photo: Thomson200, CC0