More than 40,000 service members and civilians rallied at Shepherd Memorial Drill Field here to cheer for the 16,373 runners who crossed the finish line during the 11th annual Rock ‘n’ Roll Marathon on June 1. Nearly 30 Headquarters and Service Battalion Marines were among the racers. - More than 40,000 service members and civilians rallied at Shepherd Memorial Drill Field here to cheer for the 16,373 runners who crossed the finish line during the 11th annual Rock ‘n’ Roll Marathon on June 1. Nearly 30 Headquarters and Service Battalion Marines were among the racers.