The Back 40 Run & Ride is always held on the second weekend in December. Come experience one of the newest trail systems in northwest Arkansas, opened in 2016 and nationally known. The Back 40 Trails in Bella Vista, Arkansas feature nearly 40 miles of pure Arkansas singletrack. Dirt, rocks, roots, ravines, bridges, waterfalls – we have it all. This two-day event, brought to you by the organizers of the award-winning War Eagle Trail Festival and the City of Bella Vista, brings trail runners and mountain bikers together to race through the woods. Push some limits, and have a blast doing it.