Marmolejo, Pleistocene stratovolcano in San José de Maipo, Chile.
Marmolejo is a Pleistocene stratovolcano on the border between San José de Maipo and Argentine territory. The mountain rises to about 6,100 meters and displays a wide collapsed crater at its summit with clearly visible volcanic features.
The peak was first climbed in 1928 by German mountaineers, marking the start of documented exploration of this mountain range. The route across the pass later became a known pathway for expeditions in this section of the high Cordillera.
The name honors Alonso de Góngora Marmolejo, the first chronicler of Chile who arrived in 1549. Locals recognize this peak as a defining landmark of the Cordillera and a symbol of the region's untamed landscape.
The route involves river crossings and follows unmarked paths in places, so GPS and map skills are needed. Waterproof gear and solid physical fitness are important since conditions are demanding and can change quickly.
This is the southernmost mountain peak on Earth that exceeds 6,000 meters in height. Very few climbers reach the summit each year, making it a true hidden gem for experienced mountaineers.
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