Cerro Tres Picos, Mountain peak in Sierra de la Ventana, Argentina.

Cerro Tres Picos is the highest summit of the Sierra de la Ventana, in the Tornquist Partido of Buenos Aires Province, reaching 1239 m above sea level. The photograph shows a broad, rounded main summit on the left and a slightly lower one on the right, joined by a shallow saddle. Dry short grass in tan, brown and muted green covers the slopes, with banded grey and brown rock outcrops along the top and upper ridges.

The geological formation of this peak dates back 400 million years, making it part of the oldest mountain structures in Argentina's pampas region. These ancient rocks create a striking contrast with the flat plains that surround them.

The land surrounding this peak is managed by Fundación Funke, a foundation established in 1938 through a donation by German immigrant Rodolfo Funke. This organization has shaped how people today experience and move through the mountain landscape.

The climb to the summit is demanding and typically takes 5 to 6 hours, requiring hikers to bring water, food, and appropriate mountain gear. Starting early in the day is wise to ensure you have daylight for the descent.

Camping at Cueva de los Guanacos, a spot on the ascent, breaks the climb into two days and lets hikers avoid the trails during midday and early afternoon heat. The eight-kilometre trail from the Fundación Funke property gains 800 metres to the summit.