Chulu East, South Buttress, 1988. On November 25, 1988, Sara Ballantyne, Nuru Wangchu and I stood on the summit of Chulu East. We believe we had made the first ascent of the triangular-shaped south buttress, 2000 feet of 60° ice. Approach camps were at 13,000 feet, where a yak was killed by a snow leopard one evening, Base Camp at 15,000 feet and High Camp at 17,200 feet at the col between Chulu Far East and Chulu East. This appears to be the most direct and classic line on the mountain.