Ama Dablam. Photo: Steve Hicks

A Scottish teenager has become the youngest person to scale the Himalayan peak of Ama Dablam.

Calum Macintyre, 16, summited the mountain on 25 October. His father, Ramblers Scotland director Dave Morris, was thwarted in his attempt by a chest infection. The pair were attempting the 6,812m (22,349ft) mountain to raise cash for the Teenage Cancer Trust.

Mr Morris had throat cancer and his voice box was removed earlier this year. Calum’s sister Esme had a brain tumour and, though recovering, is still receiving support from the trust. Calum has so far raised 90 per cent of his £5,000 target.

Ama Dablam – the shapeliest peak in the Khumbu region near Everest – is a technically difficult climb, first achieved in 1961.

Calum, a student at Kinross High School, made the ascent with guide Sandy Allan of Newtonmore. They acclimatised at Everest base camp before the ascent. Dave Morris managed to scale a height of more than 20,000ft on Lobuche east peak, no mean feat for someone with a throat stoma.

Calum said: “My sister, Esme, was diagnosed with a brain tumour in November 2006 and has spent a lot of time in the Royal Hospital for Sick Children in Edinburgh.

“She continues to make vast progress and gets a lot of support from the Teenage Cancer Trust. Another motivation for me to raise money for a cancer charity is because my father was also treated for cancer in 2008.”

The student, who has been an avid outdoors fan since childhood, has set up a justgiving website for donations.