The Río de la Quebrada de Cuchiyaco is a tributary of the Río Grande, flowing along its right margin through the dramatic landscape of Jujuy Province in northwestern Argentina. The river carves through the renowned Quebrada de Humahuaca region — a UNESCO World Heritage corridor defined by towering Andean ridges, vivid polychrome rock formations, and deep quebrada valleys. The Cuchiyaco drainage contributes to the broader hydrological network of the Río Grande basin, and its lower reaches are associated with the formation of alluvial fans and cones — the result of mud flows and detrital material deposited over geological time. This geomorphological character gives the river a dynamic, shifting nature typical of Andean tributary streams in this part of the Eastern Mountain Range, where elevations rise dramatically from the valley floor toward the high peaks of the surrounding sierras.