The Río Gallipavo, known locally as Estero Gallipavo, flows through the Ñuble Region of Chile near the commune of Bulnes, serving as a tributary within the broader Itata River watershed. This stream winds through the fertile alluvial and volcanic ash-derived soils of the Ñuble Valley, a landscape shaped by Quaternary alluvial and volcanic deposits that give the surrounding terrain its characteristically flat to gently rolling character. The river has historically played an important role in the agricultural life of the region, providing irrigation to the farming communities of Bulnes and contributing to the rich hydrological network that includes the Itata, Diguillín, and Larqui rivers. The area experiences a temperate Mediterranean climate, with annual precipitation averaging around 1,025 mm concentrated in the winter months, and temperatures ranging from approximately 3.7°C in July to 28.8°C in January — conditions that shape the seasonal rhythms of the stream and its fishery throughout the year.