 The western part of Hebei rises into the Taihang Mountains (Taihang Shan), while the Yan Mountains (Yan Shan) run through northern Hebei, beyond which lie the grasslands of Inner Mongolia.The Great Wall of China cuts through northern Hebei from east to west as well, briefly entering the border of Beijing Municipality, and terminates at the seacoast of Shanhaiguan in northeastern Hebei.The highest peak is Mount Xiaowutai () in Yu County in the northwest of the province, with an altitude of .