Garrett Madison, 44, climbed Lhotse, the world’s fourth tallest peak at 8,516 metres (27,939 feet) on Thursday, a day after he made his 13th ascent of Everest, at 8,849 metre (29,032 feet), said Ishwari Paudel of the Himalayan Guides company, which is helping Madison with logistics. “It is very difficult to climb all three peaks in a single season and only a few other mountaineers have done it,” Paudel said. Hiking company official Paudel said Madison was accompanied by three sherpa climbers on all three peaks