Rock routes near Huayna Potosi, 1981. Yves Astier and Olivier Mandrènes climbed four rock routes in the Huayna Potosí region from June 30 to July 7, 1981. Two of the climbs were on the south side of Khala Cruz (5240 meters, 17,192 feet), sometimes called “Ayallaco,” south of the Zongo Pass. A third was the southeast ridge of Peak 5485 (17,995 feet), west of the Zongo Pass. The fourth was the north-central pillar on the west side of “Cerro Milluni,” (5720 meters, 18,767 feet), the peak south of Huayna Potosí and prominent from the Milluni mine. The Zongo Pass area offers the best rock climbing near La Paz, on generally sound granite.