Arkansas State Parks Trip Ideas Filter Park Delta Heritage Trail [X] Devil's Den Region Northwest Article: Park Activity Mountain Biking Article: Trail Type [X] Mountain Biking Article: Trail Difficulty Author Joe Jacobs Meg Matthews Monika Rued Date Published November 2016 Video Blog: Mountain Biking…Squirrel! Nov 01, 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. A Sacred Place – The Fossil Flats Mountain Bike Trail Nov 01, 2016 ⁄ Joe Jacobs Fossil Flats is a six mile trail tucked away in Devil's Den State Park that is home to the Arkansas Mountain Bike Championships and Ozark Mountain Bike Festival . Arkansas State Park IMBA World Summit Bookend Rides Nov 01, 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.