The Tsarap River contributes to the minimal agricultural production of the Zanskar valley, mainly to the lower areas of Chia, by providing irrigation to the fields of barley, wheat, buckwheat and peas. Accessible in the summer, the Pensi La mountain pass which connects Zanskar with rest of the country, receives heavy snowfall along with the other pass Zojila, which results in the valley is cut off during winter from rest of the state, and the river freezes during this season. The river source at Pankpo La near Sarchu lies 255 kilometres (158 mi) southeast from the nearest airport of Leh. The Tsarap River is famous for adventure sports. Rafting events are organised in the Tsarap, Stod and the Zanskar rivers.