The Nyamjang Chu river originates in the snow-clad peaks of the eastern Himalayas, north of Taga in the Qudromo township of the Cona County, at an elevation of . Frederick Bailey and Henry Morshead, explored the region in 1913. They crossed into the valley of Nyamjang Chu from that of Nye Chu via the Hor La pass. They give the name of the village as Gyao, which appears to be an older name of Taga. The land at this elevation was only good for grazing. The shepherds lit sheep-dung fires around the campsites to protect their flocks from the wolves.