The Rio Escondido is a stream in the state of Coahuila

Coahuila

Coahuila, formally Coahuila de Zaragoza , officially Estado Libre y Soberano de Coahuila de Zaragoza is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico...

, 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 is a tributary of the Rio Grande

Rio Grande

The Rio Grande is a river that flows from southwestern Colorado in the United States to the Gulf of Mexico. Along the way it forms part of the Mexico – United States border. Its length varies as its course changes...

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The Rio Escondido enters the Rio Grande (Rio Bravo del Norte in Mexico) at Rio Grande river kilometer

River mile

In the United States, a River mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the River kilometer...

 794 kilometres (493.4 mi), about 5 kilometres (3.1 mi) downriver from Piedras Negras

Piedras Negras

Piedras Negras may refer to:* Piedras Negras, Coahuila, a city in northern Mexico* Piedras Negras , an archaeological site of the pre-Columbian Maya civilization, located in the present-day Petén department of Guatemala...

, Coahuila, and Eagle Pass, Texas

Eagle Pass, Texas

Eagle Pass is a city in and the county seat of Maverick County The population was 27,183 as of the 2010 census.Eagle Pass borders the city of Piedras Negras, Coahuila, Mexico, which is to the southwest and across the Rio Grande. The Eagle Pass-Piedras Negras Metropolitan Area is one of six...

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The Rio Escondido originates in the Serranias del Burro mountain range and flows generally east to the Rio Grande. Its main tributary is the Rio San Antonio, which enters the Rio Escondido about 19 kilometres (11.8 mi) upriver from the Rio Grande confluence.