Arkansas State Parks Trip Ideas Filter Park Jacksonport Lake Catherine Lake Frierson Moro Bay White Oak Lake Withrow Springs [X] Crater of Diamonds [X] Lake Charles [X] Pinnacle Mountain Region Southwest Central Northwest Upper Delta Park Activity Hiking Watchable Wildlife Climbing Diamond Digging Fishing Geocaching Kayaking / Canoeing Swimming Trail Type [X] Day Hikes Trail Difficulty Moderate Strenuous [X] Easy Author Arkansas State Parks Staff Meg Matthews Date Published May 2018 December 2016 March 2016 Six Hidden Gems of Arkansas State Parks May 2018 ⁄ Arkansas State Parks Staff Arkansas is lush with State Parks that people travel from all over to discover. But check out this list of parks that fly under the radar with hidden beauties and a secluded environment. 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... 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.