Arkansas State Parks Trip Ideas Filter Park Logoly [X] Crater of Diamonds [X] Devil's Den Region Northwest Southwest Park Activity Diamond Digging Mountain Biking Trail Type Mountain Biking Trail Difficulty Author Mystina Swaim [X] Monika Rued [X] Meg Matthews Date Published November 2020 September 2018 [X] June 2017 May 2017 December 2016 [X] November 2016 October 2016 September 2016 Crater Diamond Find: 2.78-Carat Way Out Yonder Diamond Jun 2017 ⁄ Monika Rued A couple spotted a large brown gem at Crater Diamonds State Park that turned out to be a 2.78-carat diamond. 2.65-Carat Diamond Found at Crater of Diamonds State Park Jun 2017 ⁄ Monika Rued A 25 year old woman thought she had only picked up a piece of glass at Crater of Diamonds State park, but in reality, she found out she had discovered a 2.65-carat brown diamond. Video Blog: Mountain Biking…Squirrel! Nov 2016 ⁄ Meg Matthews The popularity of mountain biking has exploded in Arkansas. With mild fall temperatures and beautiful autumn color, now is the time to get on your bike and ride. Arkansas State Park IMBA World Summit Bookend Rides Nov 2016 ⁄ Monika Rued Arkansas State Parks has been involved in mountain biking since the 1980s and still have a variety of rides, competitions, trails and bike shops.