Chopicalqui, Northwest Ridge, 1980. In June, 1980, after climbing Pisco, a Czechoslovakian group led by Igor Norak and composed of Jakoslava Tallora, Sylva Talla, Zdenek Brebec and Josef Kada climbed the northwest ridge of Chopicalqui, pioneered to the 20,000-foot foresummit by Americans in 1968. Apparently the Czechoslovaks made the first ascent of the entire ridge, which was later climbed by Renato Casarotto and Alberto Campanile in August, 1980. (See A.A.J., 1981, page 215.)