The river is named after navy hydrographer Enrique Simpson who explored the area in the 1870s.

[2] The Blanco River gushes through canyons in the northeastern part of Reserva Nacional Cerro Castillo.

The river corridor is a veritable geological wonder with a myriad of canyons composed of dark basalt, limestone, shale and sandstone.

There is also the wonderful sight of Cerro Castillo (2675 m), highest peak in the region, thus named because it resembles a medieval castle.

You can help Wikipedia by expanding it.This article related to a river in Chile is a stub.