Nagchu Horse Racing Festival is the grandest annual event in northern Tibet. Tens of thousands of herdsmen gather on the vast grassland dotted with tents to enjoy the horse riding competition, yak race, tug of war, stone-lifting and Tibetan operas. August is the golden season for tourists to sightsee the vast and beautiful green grassland covered by flower. During this time, the grass is the tallest and the weather is most accommodating to those who enjoy the great outdoors. This festival is also an exhibition and trading of local stuff among Tibetan people.