The Guzmán Basin is an endorheic basin of northern Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 and the southwestern United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It occupies the northwestern portion of Chihuahua in Mexico, and extends into southwestern New Mexico

New Mexico

New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

 in the United States.

Notable rivers of the Guzmán Basin are the Casas Grandes River

Casas Grandes River

-References:*Atlas of Mexico, 1975 .*The Prentice Hall American World Atlas, 1984.*Rand McNally, The New International Atlas, 1993....

, which empties into Lake Guzmán, the Santa Maria River

Santa Maria River (Chihuahua)

-References:*Atlas of Mexico, 1975 .*The Prentice Hall American World Atlas, 1984.*Rand McNally, The New International Atlas, 1993....

, which empties into Lake Santa Maria, the Carmen River

Carmen River

-References:*Atlas of Mexico, 1975 .*The Prentice Hall American World Atlas, 1984.*Rand McNally, The New International Atlas, 1993....

, and the Mimbres River

Mimbres River

The Mimbres River is a river in southwestern New Mexico. It forms from snow pack and runoff on the south-western slopes of the Black Range and flows into a small endorheic basin east of Deming, New Mexico. The uplands watershed are administered by the US Forest Service, while the land in the...

 of New Mexico.

The Guzmán Basin is home to several endemic

Endemic (ecology)

Endemism is the ecological state of being unique to a defined geographic location, such as an island, nation or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, all species of lemur are endemic to the...

 and near-endemic fish species, including the Chihuahua Chub (Gila nigrescens), Palomas Pupfish (Cyprinodon pisteri), Whitefin Pupfish (C. albivelis), and Perrito de carbonera (C. fontinalis).