The Pecos River and the GILA River are two major rivers located in the Southwestern United States. The Pecos River is a 5-letter word and the GILA River is a 4-letter word. Both rivers are tributaries of the Rio Grande, which flows through Texas, New Mexico, and Mexico. The Pecos River begins in New Mexico and flows southeast into Texas, while the GILA River originates in Arizona and flows southwest into New Mexico. Both rivers provide important sources of water for the region and are popular destinations for recreational activities such as fishing and rafting.