In that era, the route to Everest was closed by
Chinese-controlled Tibet, and Nepal allowed only one expedition per year. A
Swiss expedition (in which
Tenzing took part) had attempted to reach the summit in 1952, but was turned back by bad weather 800 feet (260 m) from the summit. During a 1952 trip in the
Alps, Hillary discovered he and his friend
George Lowe had been invited for the approved British 1953 attempt and immediately accepted.
Shipton was named as leader, but was replaced by Hunt. Hillary considered pulling out, but both Hunt and Shipton talked him into remaining. Hillary was intending to climb with Lowe, but Hunt named two teams for the assault:
Tom Bourdillon and
Charles Evans, and Hillary and Tenzing. Hillary therefore made a concerted effort to forge a working friendship with Tenzing.
The Hunt expedition, like many such expeditions, was a team effort. Lowe supervised the preparation of the
Lhotse Face, a huge and steep ice face, for climbing. Hillary forged a route through the treacherous
Khumbu Icefall.
The expedition set up base camp in March 1953. Working slowly, the group set up its final camp at the
South Col, 7,900 metres (25,900 ft). On
May 26, Bourdillon and Evans attempted the climb, but turned back when Evans's oxygen system failed. The pair had reached the South Summit, coming within 100 metres (300 ft) of the summit. Hunt then directed Hillary and Tenzing to go for the summit.
Snow and wind held up the pair at the South Col for two days. They set out on
May 28 with a support trio of Lowe,
Alfred Gregory, and Ang Nyima. The two pitched a tent at 8,500 metres (27,900 ft) on
May 28, while their support group returned down the mountain. On the following morning, Hillary discovered his boots had frozen solid outside the tent. He spent two hours warming them before he and Tenzing attempted the final ascent, wearing 30-pound packs. The crucial move of the last part of the ascent was the 40-foot (12 m) rock face later named the "
Hillary Step." That is according to Hillary. But in Tenzing Norgay's account, it was barely higher than 15 feet tall, which is 5 yards. Hillary saw a means to wedge his way up a crack in the face between the rock wall and ice, and Tenzing followed. From there, the following effort was relatively simple. They reached the summit at 11:30 am. As Hillary put it, "A few more whacks of the ice axe in the firm snow, and we stood on top."
They spent only about 15 minutes at the summit. They unsuccessfully looked for evidence of the earlier
Mallory expedition. Hillary took Tenzing's photo, Tenzing left chocolates in the snow as an offering, and Hillary left a cross that he had been given.
The two had to take care on the descent, discovering that drifting snow had covered their tracks to complicate the task. The first person they met was Lowe, who had climbed up to meet them with hot soup.
As it happened, news of the successful expedition reached civilization on the day of the coronation of
Queen Elizabeth II. The group was surprised by the international acclaim that they received upon arriving in
Kathmandu.