The formation includes seven rock "chimneys" that range in height from 65 to 120 feet (20 to 37 m) above ground level.

The chimneys are formed from limestone that began to accumulate and harden into stone about 500 million years ago in the Paleozoic Era, when the region was underwater.

Over time, enormous upward pressures of magma and widespread geologic upheaval, which created the Appalachian Mountains, combined with erosive forces of water and destroyed weaker layers of stone.

[1] The park, located along the North River, has a 145-site campground with a pool, playground, and hiking trails.

The UTMB Grindstone Festival, an endurance running event including a 100-mile race, takes place at the park each fall.