No Thoroughfare Canyon Trail

This trail is located in Colorado National Monument and spans 8.5 miles one way, with an elevation range of 5,000 to 6,820 feet. The trail is considered moderate to strenuous and is designated for hiking only, with horses prohibited. It travels through a remote canyon, with the upper portions of the trail being unmaintained, and hikers are advised to bring a compass and topographic map if attempting the entire route.