Arkansas State Parks Trip Ideas Filter Park Delta Heritage Trail Jacksonport Lake Catherine Lake Charles Lake Frierson Moro Bay Mount Magazine Ozark Folk Center White Oak Lake Withrow Springs [X] Pinnacle Mountain [X] Crater of Diamonds Region Central Southwest Park Activity Climbing Hiking Watchable Wildlife Diamond Digging Trail Type [X] Day Hikes Trail Difficulty Easy Strenuous Moderate Author Arkansas State Parks Staff Meg Matthews Ron Salley Date Published December 2016 August 2016 March 2016 1.73-Carat Diamond Found at Crater of Diamonds State Park Dec 2016 ⁄ Meg Matthews Crater of Diamonds State Park is the only public diamond mine in the world. If a visitor finds a diamond its their's to keep. Recently, two guests who go to Crater of Diamonds on a regular basis found the third-largest diamond at the park in 2016. The diamond is a 1.73-carat white gemstone. The new owners of this diamond say they haven't yet decided what they will do with... Is Pinnacle Mountain a Volcano? Aug 2016 ⁄ Ron Salley Pinnacle Mountain stands about 1,000 feet above sea level, is on the extreme eastern edge of the Ouachita Mountain range, and sits where three rivers converge. Pinnacle Mountain State Park Rocks! Mar 2016 ⁄ Arkansas State Parks Staff Tucked away in central Arkansas, Pinnacle Mountain is one of the most accessible state parks for hiking, backpacking, climbing, camping, and biking.