The Carolina Thread Trail is a network of trails, greenways, blueways and conservation corridors linking 15 counties in North and South Carolina and is a collaborative project of unprecedented scale. Visit us at www.carolinathreadtrail.org. The Carolina Thread Trail (CTT) is a network of greenways and conserved corridors that links 15 counties in North and South Carolina. A collaborative project of unprecedented scale, CTT connects our region and places of interest and conserves our most significant natural areas. CTT is a unique and comprehensive initiative offering the benefts of alternative transportation, economic development, recreation, connectivity, health and wellness, water quality and quantity, conservation corridors, public access and wildlife habitat.