Colin Monteath / Trekkers cross a swing bridge over the Braldu River en route to Baltoro Glacier, Karakoram Mountains, Pakistan

Colin Monteath / Trekkers on Buchanan Peaks with Mount Aspiring behind, Lake Wanaka, New Zealand

Colin Monteath / Trekkers descend steep scree slopes from Santa Rosa Pass with Jurau Lake and peaks of Yerupaja and Siula Grande in clouds, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Trekkers camp near Carhuacocha Lake under Yerupaja peak, Cordillera Huayhuash, Andes, Peru