Sierras de Sumampa, Mountain range in Santiago del Estero Province, Argentina

The Sierras de Sumampa form a mountain range in Santiago del Estero Province featuring granite formations and many streams. Elevations reach around 600 meters, creating a diverse landscape across the terrain.

In 1997, Provincial Law No. 6381 created the Sierras de Sumampa multiple-use provincial reserve under Law No. 5787. The designation has had limited effect: much of the protected area is occupied by residents who clear timber species and keep goats, which browse trees and reach ledges and ridges. Wild fauna is also hunted by residents, for food, for sport or to remove predators of domestic animals.

The range lies within the Reserva Provincial de Uso Múltiple Sierras de Sumampa, created in 1997 by provincial law 6381. Most of the protected area is occupied by residents who keep goats; the animals climb trees and reach ledges, so few habitats escape grazing. Settlements are scattered across the departments of Quebrachos, Ojo de Agua, Río Seco and Sobremonte.

The range lies on the border of Santiago del Estero and Córdoba provinces; the interprovincial sector is near 29°38′S 63°37′W. In Córdoba, the southern end is separated from the Sierra Norte by Provincial Route 22. The protected area, created in 1997 by provincial law 6381, has many residents and goats, so expect grazing land rather than a managed reserve.

The range rises only a few hundred metres above a plain at about 300 m, so it wrings little rain from the clouds; most humidity passes on to the Catamarca ranges. Dense vegetation, its shade, and cool ravines with temporary streams still make the slopes milder than the plain below.