During the Great Chilean earthquake , several landslides near Tralcán Mountain blocked the outflow of Riñihue Lake at ( ) . Riñihue Lake is the lowest of the Seven Lakes chain and receives a constant inflow from the Enco River . The blocked San Pedro River , which drains the lake , passes through several towns and the city of Valdivia before finally reaching Corral Bay
Great Chilean earthquake
1960 Valdivia earthquake
Riñihuazo