The Río Potrero de Castilla is located in the La Caldera department of Salta, Argentina. This water body is situated within a remote and rugged high-altitude landscape. The area is characterized by valleys, ravines, and streams, and reaching the Potrero de Castilla site itself requires a significant trek of approximately twelve hours on foot or by horse along trails. This suggests that the river and its immediate surroundings are not easily accessible by road, and any paddling trip would likely involve a substantial logistical effort for put-in and take-out. The general region features a trail with a total distance of 25.68 kilometers and a significant positive elevation gain of 1,320 meters, reaching a maximum altitude of 2,691 meters above sea level. This indicates the river flows through steep, mountainous terrain typical of the Andean region. The high altitude and challenging access contribute to an experience suited for highly adventurous and self-sufficient paddlers seeking isolation. No specific information is available regarding designated launch points, seasonal water levels, water temperature, water quality, regulations, or facilities directly on the river. The primary appeal for a visitor to this area would be the remote wilderness and the dramatic geographical features of the landscape.