Cerro Arenas, Mountain summit in Cajón del Maipo, Chile.
Cerro Arenas is a mountain summit in the Principal Cordillera of Cajón del Maipo that reaches 4,450 meters in elevation. Its south face presents a dramatic wall of rock rising roughly 1,400 meters high with varied geological formations.
The summit was first recorded as climbed in 1954, marking its emergence as a recognized climbing destination. This early ascent opened the peak to wider mountaineering attention in the region.
Local mountain guides lead expeditions through this peak, sharing their expertise of the Andean environment with visiting climbers throughout the seasons.
The climbing season runs from November through March when weather conditions are most favorable. Plan to arrive with proper mountain gear and experience, as technical climbing skills are essential for a safe ascent.
Climbers can choose between a continuous four-pitch ascent or a split climb with a camp halfway up the mountain. This flexibility allows climbers to match the route to their abilities and available time.
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