Arkansas State Parks Trip Ideas Filter Park Crater of Diamonds Pinnacle Mountain Region Central Southwest Lower Delta North Central Northwest Upper Delta Park Activity Climbing Diamond Digging Hiking Watchable Wildlife Backpacking Boating / Marinas Fishing Geocaching Hang Gliding Horseback Riding Kayaking / Canoeing Lake Tours Motorcycling Mountain Biking River Running Road Cycling Snorkeling / Scuba Diving Swimming Trail Type Day Hikes Backpacking Barrier Free (ADA) Horseback Riding Kayaking/Water Trails Mountain Biking Wilderness Trail Difficulty Moderate Strenuous [X] Easy Author Arkansas State Parks Staff Meg Matthews Monika Rued Date Published November 2019 May 2018 [X] December 2016 November 2016 April 2016 [X] 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... Green Friday is Time to #OptOutside Dec 2016 ⁄ Monika Rued Nov. 25 is Green Friday, an alternative to the crowds by choosing to #OptOutside and get outdoors. Arkansas State Parks has been offering Green Friday events for over seven years. 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.