longest rivers. It originates at the confluence of the San Martin and Zahuapan Rivers as Atoyac River in the state of Puebla. From here it flows south-west...

Acatlán River San Martín River Zahuapan River Atoyac River Papagayo River Omitlán River Ometepec River Quetzala River Río Verde Atoyac River Atoyaquillo...

mountains along with those from the Iztaccihuatl volcano and waters from the Zahuapan River, which enters from Tlaxcala. This river receives further water from...