Runners compete in the Beijing Mountain Marathon on Sunday at Beijing Xishan National Forest Park in Beijing. Organized by erun360.com, the annual 42.195-kilometer mountain marathon features winding paths, gravel roads, trails and steps that bring out more than one thousand of marathon enthusiasts. Yan Longfei won the title in 3 hours, 52 minutes and 35 seconds. No paper cups were offered to the racers during the event in order to promote environmental awareness. Photo: Cui Meng/GT