Heavy snows and an early monsoon forced their retreat on several occasions, and on the final attempt two climbers narrowly survived an avalanche.
Led by Eric Shipton, it was a small, low-cost effort which confirmed that the best route from Tibet was up the East Rongbuk Glacier to the North Col.
Long afterwards Shipton wrote I had hoped that the achievements of the 1935 expedition, which had been generously applauded, would convince the 'Establishment' of the virtues of a light and mobile party.
Having tasted the joys of simplicity and freedom in two long seasons of unrestricted travel, I felt so out of sympathy with the enterprise that I certainly should have had the strength of mind, the integrity, to refrain from joining it.The rancorous arguments within and surrounding the Everest Committee preceding the 1935 reconnaissance had led to Shipton replacing Hugh Ruttledge for that one expedition but Ruttledge was confirmed as leader for 1936.
[5] Tilman then proceeded to show the decision had been wrong by leading a very successful team to reach the summit of the 25,645-foot (7,817 m) Nanda Devi in 1936, at that time the highest mountain to have been climbed.
[11] The party travelled via Darjeeling, Kalimpong and Kampa Dzong and were blessed by the Lama when they reached Rongbuk Monastery on 25 April 1936 in fine weather and good snow conditions on the ground.
Heavy snow that day and next delayed progress and destroyed the steps cut to the Col itself so a fresh attempt was made on 13 May, led by Smythe.
Beset by bad weather, they stayed at Camp III for two days until Wyn Harris persuaded Ruttledge, against his better judgement, to allow him and Shipton to try again.
He wrote "we are beginning to look ridiculous", that future expeditions should be planned and led by climbers, there should be a permitted age range of 25–35, the leadership should not be military, and that the inherent risks of mountaineering need to be accepted.
[18] Tenzing Norgay wrote in a more supportive manner: Mr Ruttledge was too old to be a high climber, but he was a wonderful man, gentle and warm-hearted, and all the Sherpas were very glad to be with him.
A 1999 expedition found Mallory's body at this place and photographs of his remains made newspaper front pages internationally.