26°11′24″N 100°34′31″E / 26.19000°N 100.57528°E
Dadan River (simplified Chinese: 达旦河; traditional Chinese: 達旦河; pinyin: Dádàn hé) is a right tributary of the Jinsha River in Yunnan, Southwestern China. It is 102.4 km long in total, with a watershed area of 1,888 square kilometers.