Río Abaucán is a remote and rugged river system cutting through the high desert landscapes of Catamarca and La Rioja provinces in northwestern Argentina. Fed by snowmelt and precipitation from some of the most dramatic Andean peaks in South America — including the volcano Nevado Incahuasi at 6,638 meters, Cerro El Muerto at 6,488 meters, and Cerro Negro de Laguna Verde at 5,764 meters — the river originates in the Tinogasta Department of Catamarca Province. Its headwaters begin as the Río Chascuil, transitioning to the Río Guanchín as it descends toward the spa town of Fiambalá, where it receives the waters of the Río Fiambalá before eventually becoming the Abaucán proper. The river drains a vast basin of approximately 43,386 square kilometers, flowing through a region characterized by very low precipitation, making snowmelt from the high Andes the primary driver of its hydrology. With an average discharge of roughly 2.54 cubic meters per second, the Abaucán is a relatively modest river by volume, threading through arid terrain before ultimately reaching the Desagües del Río Salado. The surrounding landscape is stark and spectacular — a high-altitude desert environment framed by volcanic peaks and ancient geology that gives this river a truly wild and untamed character unlike anything found in more temperate fishing destinations.