The Shut-In Ridge Trail Run / Race is a 17.8 mile endurance running event that takes place in the mountains near Asheville, NC. The route begins in the North Carolina Arboretum and ascends approximately 5,000 feet, with a finish line at the top of Mt. Pisgah. The last two miles are steep and technical, to such an extreme that observers may see "runners hanging on to trees to keep from falling backward".