Run Amuck racers charge the hills of Marine Corps Base Quantico, Va., Aug. 14, 2010. The race drew 2,130 runners, who climbed walls, crawled through pipes and slogged across mud pits, all while running the 3.5 mile course. - Run Amuck racers charge the hills of Marine Corps Base Quantico, Va., Aug. 14, 2010. The race drew 2,130 runners, who climbed walls, crawled through pipes and slogged across mud pits, all while running the 3.5 mile course.