Arkansas State Parks Trip Ideas Filter Park [X] Crater of Diamonds [X] Devil's Den Region Northwest Southwest Park Activity Diamond Digging Hiking Mountain Biking Watchable Wildlife Trail Type Mountain Biking Trail Difficulty Author Meg Matthews Mystina Swaim [X] Monika Rued Date Published November 2020 [X] September 2018 [X] June 2017 May 2017 [X] November 2016 October 2016 Devil's Den State Park Visitor Gallery Sep 2018 ⁄ Monika Rued We love singing the praises of Devil's Den State Park but don't just take our word for it. Check out our visitor gallery and tag Devil's Den State Park or use #ARstateparks to share your pics and videos. 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. 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.