Arkansas State Parks Trip Ideas Filter Park [X] Crater of Diamonds [X] Devil's Den Region Southwest Northwest Park Activity Diamond Digging Mountain Biking Trail Type Mountain Biking Trail Difficulty Author Meg Matthews Mystina Swaim [X] Monika Rued Date Published November 2020 September 2018 [X] June 2017 [X] May 2017 [X] November 2016 October 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. Teen Finds 7.44-Carat Diamond at Arkansas’s Crater of Diamonds State Park May 2017 ⁄ Monika Rued An Arkansas teen found a 7.44-carat diamond at Crater of Diamond State Park after only searching for 30 minutes. It is the 7th-largest diamond found at the parks since 1972. 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.