The Bailey–Morshead exploration of the Tsangpo Gorge was an unauthorised expedition by Frederick Bailey and Henry Morshead in 1913 which for the first time established the definite route by which the Tsangpo River reaches the sea from north of Himalaya, through the Tsangpo Gorge.

Frederick Marshman Bailey was a British political officer and one of the last protagonists of The Great Game. His expeditions in Tibet and Assam Himalaya gave him many opportunities to pursue his hobbies of photography, butterfly collecting, and trophy hunting in the high Tibetan region. Over 2000 of his bird specimens were presented to the Natural History Museum, although his personal collection is now held in the American Museum of Natural History, New York. His papers and extensive photograph collections are held in the British Library, London.