San Juan River (Argentina)

San Juan River
The San Juan River
Path of the Rio San Juan
Location
CountryArgentina
ProvinceSan Juan
Physical characteristics
Source 
  locationConfluence of the Calingasta, Castaño Viejo, and los Patos rivers
Mouth 
  location
Desaguadero River
Length500 km (310 mi)
Basin size39,906 km2 (15,408 sq mi)
Discharge 
  average56 m3/s (2,000 cu ft/s)
Basin features
ProgressionDesaguadero River
Atlantic Ocean

The San Juan River is, together with the Jáchal, an important river in Argentina's San Juan province. Both join the Desaguadero/Colorado system that ends at the Atlantic Ocean.