The Altar River is a river located in the northern mountains of

Sonora Sonora (), officially Estado Libre y Soberano de Sonora (), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. The state is divided into Municipalities of Sonora, 72 ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

. The Altar is a desert river with seasonal flows. It originates near the international border with the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

and flows southwesterly, joining the

Magdalena River The Magdalena River (, ; less commonly ) is the main river of Colombia, flowing northward about through the western half of the country. It takes its name from the biblical figure Mary Magdalene. It is navigable through much of its lower reaches, ...

to form the

Concepción River The Concepción River (or just Concepción) is a river in Chiapas, Mexico. Other rivers There is also a Rio Concepción in Sonora, Mexico (30.528027, -112.98392). See also *List of longest rivers of Mexico *List of rivers of Mexico References

. The upper reaches of the Altar was dammed in 1943 to form the Cuauhtemoc Reservoir just west of

Tubutama Tubutama is a town in the north-west of the Mexican state of Sonora. It serves as the seat for the surrounding municipality of the same name. The municipal area is , and the population was 1,798 in 2005. The main economic activities are cattle ...

. The river claims a

watershed Watershed may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, an area of land where surface water converges (North American usage) Music * Watershed Music Festival, an annual country ...

of .

References

Rivers of Mexico {{Mexico-river-stub