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Old U.S. Highway 91 connects St. George with Santa Clara and continues to Littlefield, Arizona. West of the summit, the old highway passes a rock outcropping called Castle Cliff which is topped by a wooden flagpole. To the right (coming from St. George) a gravel road intersects Highway 91 immediately beyond Castle Cliff; the Lytle Preserve is eleven miles west along this gravel road. Yellow and black signs along the way provide directions to the preserve.
