There is something extraordinarily special about sliding on snow that has excited generations of snow sports enthusiasts. Add to this the dimension of travelling through the mountains and the result is a recipe for some of the best outdoor activity days you could ever imagine. I have been fortunate to share some of these adventures with Henry Branigan: Skiing off the summit of Mount Blanc at dawn or, equally enjoyable, skiing under the northern lights from hut to hut in Norway, still my all-time favourite way of travelling through the mountains. A complete guide to alpine ski touring, ski...