Arkansas State Parks Trip Ideas Filter Park [X] Devil's Den [X] Crater of Diamonds Region Northwest Southwest Park Activity Mountain Biking Diamond Digging Trail Type Mountain Biking Trail Difficulty Author Mystina Swaim [X] Monika Rued [X] Meg Matthews Date Published November 2020 September 2018 June 2017 [X] May 2017 December 2016 [X] November 2016 October 2016 September 2016 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. 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.