Río Calle Calle flows for approximately 55 kilometers through the Valdivia Province of southern Chile's Los Ríos Region, carrying the waters of the San Pedro River westward until they merge with the Valdivia River, which ultimately empties into Corral Bay on the Pacific Ocean. Known in the Mapuche language as Gudalafquén — a name derived from the word for the native flower Libertia chilensis — this river moves through a lush, temperate landscape characteristic of southern Chile's lake district. The river serves as a vital hydrological link in the broader Valdivia River Basin, connecting a network of glacially carved lakes and rivers that together form one of the most productive freshwater systems in South America.