The Ridgeline Trail is very runnable. The slow climb up, fast downhill, and the technical sections of the trail offer a great training run. The park rates this as being moderately difficulty. I would agree.
The Ridgeline Trail can be accessed from the Boulder Access park office just north of the South Carolina border. However, it actually starts in Kings Mountain State Park in South Carolina proper.
The trail is well marked with the Red Triangle Blaze. The trail runs for approximately 6 miles north until it meets up with the Pinnacle Trail
which runs an additional 2 miles before ending at the Sparrow Springs Access park office. The Ridgeline Trail has a few moderately technical sections and a few serious climbs, especially the last mile as of the Ridgeline Trail as it approaches The Pinnacle
, which presents a spectacular view at 1,705 feet.
This is a beautiful park with many more trails ranging from easy to strenuous. You can visit the North Carolina State Parks website
to download trail maps.