Cerro Agua Negra, 1990. A very fine route, the southeast ridge of Cerro Agua Negra (5484 meters, 17,991 feet), near the international pass of the same name, had been attempted four times in the 1960s. Climbing alone, Roberto Pereira of San Juan managed to overcome all obstacles and reached the summit in the late afternoon of November 2, 1990.

Marcelo Scanu, Grupo Andino Huamán, Buenos Aires, Argentina