hell's backbone
Hells Backbone. Hell's Backbone is a rugged area that bridges between towering Boulder Mountain on the north and canyons cut by the the Escalante River and its tributaries on the south. The Hells Backbone Road is a winding route that follows ridges and mountain contours through the area. The road forks from All American Highway 12 near the town of Boulder. From there it runs west, climbing halfway up Boulder Mountain to connect with the Posey Lake/Pine Creek Road.