On 20 May 1957, together with A. D. M. Cox, Noyce made the effective first ascent of Machapuchare (6,993 m) in the Annapurna Himal, reaching to within 50 m of the summit before turning back at that point out of respect for local religious beliefs. Noyce and Cox also made the first ascent - via the north-east face - of Singu Chuli (Fluted Peak) (6,501 m) on 13 June 1957. On 5 August 1959 Noyce, together with C. J. Mortlock and Jack Sadler, made the first British ascent of the Welzenbach route on the north face of the Dent d'Hérens. Some days later, on 15-16 August, the same party made the first British ascent of the north-east face of the Signalkuppe, the longest and most serious route on the east face of Monte Rosa.