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

Sonora Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of Sonora), is one of the 31 states which, along with Mexico City, comprise the Federal Entities of Mexico. The state is divided into 72 municipalities; the ...

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...

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

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...

and flows southwesterly, joining the

Magdalena River The Magdalena River ( es, Río Magdalena, ; 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 o ...

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 This is a li ...

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

Tubutama Tubutama is a town in Tubutama Municipality, in the north-west of the Mexican state of Sonora. Eusebio Kino, SJ, founded Mission San Pedro y San Pablo del Tubutama in 1691. Tubutama was the headquarters of religious administration for the entire ...

. The river claims a

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

of .

References

Rivers of Mexico {{Mexico-river-stub