Sierra de la Ventana (mountains)

Ventana system
Sistema de Ventania
Highest point
Peak	Cerro Tres Picos, near Tornquist
Elevation	1,239 m (4,065 ft)
Coordinates	38°9′20″S 61°57′0″W / 38.15556°S 61.95000°W / -38.15556; -61.95000
Dimensions
Length	195 km (121 mi) NW to SE
Naming
Native name	Sistema de las Sierras de Ventania (Spanish)
Geography
Country	Argentina
Province	Buenos Aires Province
Settlements	Pigüé, Puan and Tornquist

The Sierra de la Ventana (also Sierras de Ventania) is a mountain range in Buenos Aires Province, and one of only two located within the Pampas ecosystem.