Río Grande (Bolivia)

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Río Grande (or: Guapay)
Río Grande o Guapay desde el Puente Pailas (Puerto Pailas -Bolivia).jpg
Río Grande at Puerto Pailas
Origin Sierra de Cochabamba
Mouth Ichilo
Basin countries Bolivia
Length 1438 km
Source elevation 3693 m
Mouth elevation 174 m
Map of the Amazon Basin showing Río Grande (highlighted)

The Río Grande (or Río Guapay) in Bolivia rises on the southern slope of the Cochabamba mountains, east of the city Cochabamba, at 17°26′11″S 65°52′22″W / 17.43639°S 65.87278°W / -17.43639; -65.87278. At its source it is known as the Rocha River. It crosses the Cochabamba valley basin in a westerly direction. After 65 km the river turns south east and after another 50 km joins the Arque River at 17°42′10″S 66°14′45″W / 17.70278°S 66.24583°W / -17.70278; -66.24583 and an elevation of 2.350 m.

From this junction the river receives the name Caine River for 162 km and continues to flow in a south easterly direction, before it is called Río Grande. After a total of 500 km the river turns north east and in a wide curve flows round the lowland city of Santa Cruz.

After 1.438 km, the Río Grande joins the Ichilo River at 15°48′09″S 64°43′47″W / 15.80250°S 64.72972°W / -15.80250; -64.72972 which is a tributary to the Mamoré.