River, Mindanao , Philippines.
Rising in the southeast and flowing north 240 mi (390 km) to enter Butuan Bay of the Bohol Sea, it forms a fertile valley 40–50 mi (65–80 km) wide between the Central Mindanao Highlands and the Pacific Cordillera. It is navigable for 160 mi (260 km). Despite early Spanish contacts in the 17th century, most of the valley has remained sparsely settled by native peoples.