Doi Nang Non consists of a long hill tract that lies on the west side of the highway between Chiang Rai and Mae Sai. The greater part of the range is in Mae Sai District, extending west and southwest of Pong Pha along the border with Myanmar. The mountain range is an unusual land feature when seen from certain angles as its silhouette takes the shape of a reclining woman with long hair. Its highest point is Doi Tung, which corresponds to the belly of the lady.