Mururata Massif, Various Ascents. For three days I tried approaches to the unclimbed peaks east of Mururata but found no access through the rock walls that enclose the Trancapata Valley. I then marched to the peaks west of Mururata. On June 2 I climbed Cerro Churu (5197 meters, west side, rock, easy); on the summit, I found a surveyor's cairn. Two days later I made the first ascent of Cerro Cota Pata (5290 meters, north side, rock). In early July I traveled to the recently built Huayna Potosi hut, on the Zongo pass. From there I marched south to attempt the sharp unclimbed rock peaks north of Nevado Charquini. All attempts failed. I then returned to the pass and marched west, to camp in the Patacota Valley. From a camp at 15,500 feet I climbed on July 10 the imposing dark rock tower of Cerro Calacruz Chico (locally also called Cerro de la Cruz) (5020 meters, first ascent, northeast side, fairly good rock).