The Balsas River is a major river of south-central Mexico.

Guerrero, officially the Free and Sovereign State of Guerrero, is one of the 32 states that comprise the 32 Federal Entities of Mexico. It is divided into 81 municipalities. The state has a population of about 3.5 million people. It is located in southwest Mexico and is bordered by the states of Michoacán to the north and west, the State of Mexico and Morelos to the north, Puebla to the northeast and Oaxaca to the east. In addition to the capital city, Chilpancingo and the largest city Acapulco, other cities in Guerrero include Petatlán, Ciudad Altamirano, Taxco, Iguala, Ixtapa, and Zihuatanejo. Today, it is home to a number of indigenous communities, including the Nahuas, Mixtecs, Tlapanecs, Amuzgos, and formerly Cuitlatecs. It is also home to communities of Afro-Mexicans in the Costa Chica region.