The Uspanapa River, also known as the Uxpanapa or Uzpanapa, is a river of 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...

. It originates in the foothills of Sierra Atravesada subrange of the Sierra Madre de Chiapas

Sierra Madre de Chiapas

Sierra Madre is a mountain range which runs northwest-southeast from the state of Chiapas in Mexico across Guatemala and into El Salvador and Honduras. Most of the volcanoes of Guatemala are a part of this range.A narrow coastal plain lies south the range, between the Sierra Madre and the Pacific...

 mountains in the state of Oaxaca

Oaxaca

Oaxaca , , officially Estado Libre y Soberano de Oaxaca is one of the 31 states which, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided into 571 municipalities; of which 418 are governed by the system of customs and traditions...

. It flows through the Selva Zoque

Selva Zoque

The Selva Zoque , which includes the Chimalapas rain forest, is an area of great ecological importance in Mexico. Most of the forest lies in the state of Oaxaca but parts are in Chiapas and Veracruz....

 and the municipio

Municipalities of Mexico

Municipalities are the second-level administrative division in Mexico . There are 2,438 municipalities in Mexico, making the average municipality population 45,616...

of Uxpanapa in the state of Veracruz

Veracruz

Veracruz, formally Veracruz de Ignacio de la Llave officially Estado Libre y Soberano de Veracruz de Ignacio de la Llave , is one of the 31 states that, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided in 212 municipalities and its capital city is...

 from which it takes its name. It is a tributary of the Coatzacoalcos River

Coatzacoalcos River

The Coatzacoalcos is a large river that feeds mainly the south part of the state of Veracruz; it originates in the Sierra de Niltepec and crosses the state of Oaxaca in the region of the Isthmus of Tehuantepec, flowing for toward the Gulf of Mexico. Tributaries include El Corte, Sarabia,...

, which it joins downstream from the city of Minatitlán

Minatitlán, Veracruz

Minatitlán is a city in southeastern Mexican state of Veracruz in the Olmec region of the state and the north of the Isthmus of Tehuantepec.In 2010 the greater metropolitan area had a population of 356,020...

 and upstream from Nanchital

Nanchital

Nanchital is a Municipality in Veracruz, Mexico. It is located in south-east zone of the State of Veracruz, about 438 km from state capital Xalapa. It has a surface of 63.99 km2...

.