The Biobío River is one of the longest rivers in Chile, stretching approximately 380 kilometers. It originates in the Andes mountains and flows westward into the Pacific Ocean. The river serves as a natural boundary between the Biobío Region and the La Araucanía Region, playing a crucial role in the local ecosystem and economy. The Biobío River is significant for its hydroelectric power generation, with several dams built along its course. It also supports agriculture and fishing, providing resources for nearby communities. The river is known for its scenic beauty, attracting tourists and outdoor enthusiasts who enjoy activities like rafting and hiking along its banks.