Sierra Nevada de Lagunas Bravas, Volcanic summit in the Central Andes, Chile

Sierra Nevada de Lagunas Bravas is a volcanic mountain complex in the Central Andes featuring multiple summits and craters spread across a vast high-altitude region. The system displays layered volcanic structures with varied topography and diverse geological formations.

Volcanic activity began in Argentina, building two stratovolcanoes before 12 or more vents opened, some with craters up to 400 m wide. Radiometric dating gives ages from 1.7 ± 0.4 to 0.431 ± 0.012 million years. The border summit of 6,127 m was long taken as the highest point; new measurements place the main summit 2.6 km east, entirely in Argentina. Cumbre del Laudo (6,122 m) was first climbed in December 2000 by a group of American mountaineers led by Robert Ayers.

The complex's name comes from the Spanish for "snowy range of the brave lagoons", referring to the high-altitude lakes below the summits. Climbers heading for the main summit cross a landscape of craters and lava flows up to 7 km long, and the border between Chile and Argentina runs through the massif, so expeditions often pass between the two countries.

The main summit lies entirely in Argentina, 2.6 km east of the 6,127 m border summit that was long taken as the highest point; new measurements place the true top there. The snowline sits at 5,800 m at Cumbre del Laudo, so expect snow and ice on the upper slopes. Approach from the Chilean or Argentine side through the Atacama and Catamarca highlands, with no settlements nearby.

The complex's main summit was long mistaken for a secondary peak: the 6,127 m border summit was thought to be the highest until new measurements showed the true main summit lies entirely in Argentina, 2.6 km east. The complex counts 9 main summits.