The rivers of the territory are the Colorado, which forms a part of its northern boundary, and the Negro, formed by the confluence of the Limay (which forms part of the western boundary) and Neuquen on the boundary between Rio Negro territory and the territory of Neuquen.
These rivers have no tributaries of importance within the territory, but the Limay receives some small streams from the Andean slopes.
There are other small settlements on the Rio Negro, which is navigable up to the Neuquen frontier (about 450 m.), but the only place of importance is General Roca (about 2300), a military and supply station situated a few miles below the confluence of the Limay and Neuquen rivers and connected with Bahia Blanca and Buenos Aires by a branch of the Great Southern railway.
NEUQUEN, an inland territory of Argentina on the Chilean frontier, between the Colorado and Limay rivers, with the province of Mendoza on the N.
The Neuquen, which unites with the Limay near the 68th meridian to form the Rio Negro, is the principal river of the territory.
It is the source of the Rio Limay and receives the overflow from two smaller neighbouring lakes.
The territory is reached by a light-draft river steamer which ascends the Rio Negro to Fort Roca at the confluence of the Limay and Neuquen, and by a branch of the Great Southern railway from Bahia Blanca to the same point.