The mouth of the river is located in the commune of Hualpén 20 minutes from downtown Concepción. It is one of the most important tourist sites of the city with its black sand beach that stretches 300 meters down the coast of Pacific Ocean. The waves are a bit strong for swimming but they´re beautiful for nature lovers and the beach is great for picnicking, photography, etc. It´s also great for water sports such as kite surfing, windsurfing, surfing, etc. Near the area, there are other natural protected areas that allow you to enjoy nature without stepping too far out of the city.
The Bio Bio is the widest river in Chile with some parts measuring approximately 2400 meters. It borders the city of Concepción and gives its name to the region. In winter the flow is almost threatening but in the summer, it becomes likes a desert due to its completely sandy bottom. Today there are 4 bridges that cross it.