Reservoir of Compuerto, reservoir in the province of Palencia, Spain

The Reservoir of Compuerto is a water storage lake in Palencia Province formed by a concrete gravity dam standing 78 meters (256 feet) tall. The water surface spreads across roughly 376 hectares (930 acres) and is surrounded by rolling hills and forests with trails running along the shoreline.

Construction of the dam finished in 1960 as a major infrastructure project to regulate the Carrion River flow through the region. The structure enabled irrigation systems and hydroelectric power generation that transformed local agriculture and energy supply.

The reservoir takes its name from the Compuerto site by the dam, not from a stream. It lies within the Parque Natural Montaña Palentina, and the Carrión reservoirs and the two at Cervera de Pisuerga form the Ruta de los Pantanos, which draws thousands of visitors each year to the mountain landscapes.

Access to the area is easiest via walking trails starting from parking areas near the dam, which loop around the water and hillsides. The routes are open year-round, though paths are most comfortable to walk during dry weather months.

The dam is a concrete gravity structure 77.7 metres high above its foundations, with a 273-metre crest at 1,223 metres above sea level. Its spillway can discharge up to 400 cubic metres per second, and the plant's installed capacity is 20 MW, operated by Iberdrola. The reservoir is state-owned.