The Phi Pan Nam Range runs across the province from north to south. The city of Phayao is on Phayao Lake (Kwan Phayao) in the valley of the Ing River. Three big mountains surround the valley, the Doi Luang (1,694 m),[2] Doi Khun Mae Fat (1,550 m) and Doi Khun Mae Tam (1,330 m).