Pinnacle Mountain is a 1,011-foot summit and the second-highest natural point in Pulaski County, Arkansas, United States; it is also the primary attraction of the 2,356-acre Pinnacle Mountain State Park. Located in the foothills of the Ouachita Mountains approximately 13 miles northwest of downtown Little Rock, Arkansas, Pinnacle Mountain is one of the most iconic landforms of the U.S. Interior Highlands.