Armadillo's Last Stand is 100% singletrack and can be ridden by riders of most skill levels. The surface is mostly hard packed with some gravel. There are log rides and short sections of more difficult terrain, all with easy alternate routes. The trail can be ridden in either direction. For more info see slaughterpen.com or phattirebicycles.com.
From Wal-Mart General Office in Bentonville, drive North on U.S. Highway #71B about 3 miles to the City of Bentonville trailhead on the right. Park here and ride the Bentonville trail North about 1/2 mile to the Slaughter Pen Hollow trailhead. This is the trailhead for 3 of the trails in the trail network.
http://www.singletracks.com/item.php?c=1&i=2014