Nestled high in the Chilean Andes within the Santiago Metropolitan Region, the Rio Yeso is a striking mountain river that feeds into the El Yeso Reservoir — a massive 250-million-cubic-meter impoundment completed in 1964 at an elevation of approximately 2,568 meters (8,425 feet) above sea level. The river and its reservoir are part of the broader Maipo river basin, one of central Chile's most important watersheds. The reservoir's water is famously turquoise in color, a hallmark of glacially influenced Andean waters, and the entire system sits within a dramatic high-altitude landscape of rugged peaks and pristine wilderness. Both the river and the reservoir offer fishing opportunities in a setting that is as visually spectacular as it is remote.