Most of the Aragonese rivers are tributaries of the Ebro, Spain's largest river in volume and which divides Aragon into two. Some important tributaries on the left side of the river (rivers that come from the Pyrenees) are the Aragón, born in Huesca but flows into the community of Navarre, the Gállego and Cinca, which joins the Segre just before ending up in the Ebro. Right tributaries are the rivers Jalón, Huerva and Guadalupe.