 The Khun Tan Range runs along the west side of the district and its highest point, 2,031 m high Doi Mae Tho, is at its southwest end.Wiang Pa Pao was one of the "mueang" in northern Thailand.In 1905 the District Wiang Pa Pao was merged with Mueang Phong and renamed Mae Suai, while the central area of the old "mueang" kept the name as the minor district ("King Khwaeng") Wiang Pa Pao.