Cerro Negro Pabellón (6,086m, 33º26´59.9"S, 69º42´09.7"W) is a rarely visited peak in the Cordón de las Delicias; it is the highest of the Cordillera Frontal, near Mendoza. The mountain had three previous ascents: first by Mendoza climbers in 1953 (although it’s unclear if they climbed to the highest summit or the slightly lower, east summit, ca 6,060m), then by a Japanese team in 1969, and once more by climbers from Mendoza in 1984.

From November 15–23, Lucas Gómez, Guillermo Ferri, Mauro Schmiedt, and Diego Cavassa (all Argentina) opened a new access route to the mountain from Portillo Argentino, which is 96km long, with a cumulative gain of 8,081m. The mountain had previously been approached from Río Tunuyán.

Once at the peak the climbers made camp at ca 3,920m. From there, the group split in two: Gómez and Ferri ascended an unclimbed peak, calling it Cerro Bautismo (5,039m); Schmiedt and Cavassa made two more camps as they approached the summit of Cerro Negro Pabellón. On November 20 they departed at 6:30 a.m. and reached the summit at 1:55 p.m. by a variant to the Japanese route (southwest ridge). On top they found a cairn with a piolet left by the 1984 expedition. They reached their camp again at 7:30 p.m.

Marcelo Scanu, Argentina 

Editor's Note: The route followed up Cerro Negro Pabellón has been corrected from the original version of this report.