Sucumbíos is bounded on the north by
Colombia, on the south by
Napo and
Orellana, on the west by
Carchi and
Imbabura, on the southwest by
Pichincha, and on the east by
Peru. Sucumbíos is the only province in Ecuador that borders two different countries. The province is one of the six provinces in the
Amazon Region, a natural region of Ecuador.
Orography The western area of the province belongs to the Eastern
Andes Mountains, where most
rivers in the province have their sources. The most important elevation in the province is the
Reventador, an active
volcano. The eastern portion of the province is part of the
Amazon Basin, with high
temperatures.
Hydrography The main river in the province is the
Aguarico River. It passes close to Nueva Loja, and empties into the
Napo, on the Peruvian border. Other important rivers are the
Putumayo, which marks the border with Colombia, and the
Coca and
Napo Rivers, in the south. == History ==