Career
On 3 June 1950, along with Maurice Herzog, he reached the summit of Annapurna I in Nepal at a height of 8,091 m (26,545 ft). Previously he had made the second ascent of the North Face of the Eiger in 1947, with Lionel Terray. He died falling into a snow-covered crevasse while skiing the Vallee Blanche in Chamonix.
The mountain Pointe Lachenal in the Mont Blanc massif was named after him.