Estero Chalaco is a watercourse located in the Valparaíso Region of Chile, specifically within the area of Resguardo de Los Patos. The primary information pertains to a hiking route named "Cajón Estero Chalaco," which suggests the water body is situated in a canyon landscape. This route covers a distance of 15.26 kilometers and typically requires approximately 6 hours to complete, indicating the surrounding terrain is substantial and potentially rugged. The area's character is defined by its mountainous setting, offering a natural and remote environment for outdoor activities. Fishing is a primary activity on Estero Chalaco, with access points and facilities for anglers. The route's significant distance and elevation profile suggest that any paddling would be within a context of considerable natural scenery, likely involving moving water influenced by the canyon topography. No information is provided concerning water temperature patterns, water quality, specific hazards, seasonal recommendations for paddling, or any regulations restricting watercraft use.