| Fortaleza River | |
| Pushpin Map: | Peru |
| Pushpin Map Caption: | Location of the mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Peru |
| Subdivision Type2: | Region |
| Subdivision Name2: | Ancash |
| Subdivision Type3: | Province |
| Subdivision Name3: | Barramca |
| Source1 Location: | Ancash |
| Mouth: | Pacific Ocean |
| Mouth Location: | Paramonga District |
The Fortaleza River originates in the Department of Ancash, Peru, in the foothills of the Cordillera Negra. It has a route of just over 100km (100miles) and a basin of 2300km2. It presents a highly irregular regime, so much so that in the months of June to October it does not reach the Pacific Ocean.[1] Its waters are intensely used for the cultivation of sugarcane. It crosses the province of Barranca from east to west and reaches the Pacific Ocean through the agroindustrial valley of Paramonga. Its mouth is located just north of the town of Paramonga.[2]