Expert Resource Collection for Exploring Río Pilcomayo National Park Landscapes

A vast wetlands wilderness in Argentina's Humid Chaco, protecting critical floodplain ecosystems on the Paraguay border

Río Pilcomayo National Park

Río Pilcomayo National Park protects a representative sample of the Eastern or Humid Chaco ecological region, one of South America's most distinctive biomes. The park's flat, low-lying terrain was formed through geological processes involving the filling of a Paleozoic crystalline rock depression with both organic and inorganic sediments, creating the sedimentary basin that underlies the protected area. The park's eastern portions feature silts and clays creating less permeable soils, while western areas contain coarser, more porous soils. This subtle variation in terrain elevation, though minimal, plays a crucial role during the wet season when the area becomes covered with interconnected pools and channels forming in the lowest-lying zones. The park's location on the border with Paraguay places it at the heart of one of South America's most important wetland systems. The Pilcomayo River, after which the park is named, serves as the lifeblood of the ecosystem, with its seasonal flooding creating the extensive marshes and lakes that define the park's character. The administration operates from Laguna Blanca, with a visitor recreation area offering camping facilities, trails, and observation platforms overlooking key wetland areas.