Friends of the Syllamo Trails is holding a big, IMBA-supported work weekend at the Syllamo Trails near Mountain View, AR at the end of January (there will be an IMBA trailbuilding class held in conjunction, but it's not mandatory if you want to just come out to work/ride). Details are still being ironed out, but you can keep up with the schedule and other information on the event Facebook page: IMBA Work Weekend at Syllamo