In 1955, Joe Brown and George Band made the first ascent on May 25, followed by Norman Hardie and Tony Streather on May 26. The full team also included John Clegg (team doctor), Charles Evans (team leader), John Angelo Jackson, Neil Mather, and Tom Mackinnon.

The ascent proved Aleister Crowley's 1905 route (also investigated by the 1954 reconnaissance) was viable. The route starts on the Yalung Glacier to the southwest of the peak, and climbs the Yalung Face, which is 3,000 metres (10,000 ft) high. The main feature of this face is the "Great Shelf", a large sloping plateau at around 7,500 metres (24,600 ft), covered by a hanging glacier. The route is almost entirely on snow, glacier, and one icefall; the summit ridge itself can involve a small amount of travel on rock.[3]

The first ascent expedition made six camps above their base camp, two below the Shelf, two on it, and two above it. They started on April 18, and everyone was back to base camp by May 28.