In 1937, Charles Houston invited Bates on an
expedition to K2 for 1938, the world's second highest mountain. It was the first expedition to the mountain for nineteen years, and while the focus was on reconnaissance and assessing the feasibility of different routes, Bates was part of a group which reached within 800 m of the summit on the Abruzzi Spur, which would become the preferred route on the mountain. Bates and Houston returned to K2 with
a new expedition in 1953. The expedition failed due to bad weather and the illness of
Art Gilkey, but was widely praised for the courage shown by the team in their unsuccessful attempt to save Gilkey. During the descent, Bates and five other climbers were involved in a near-fatal fall, saved only by the strength of
Pete Schoening, who was the last man on the rope. Bates later received the
David A. Sowles Memorial Award for his part in the attempted rescue. ==Wartime and after==