There is a route through Bhutan that guides talk about in a different tone of voice. Twenty-seven days. Eleven passes above five thousand metres. No roads, no rescue, and weather that closes the exits behind you. More people are said to quit the Snowman Trek than finish it.

We walked it in the weeks when autumn hands the mountains to winter, through Lunana, the most remote inhabited valley of the kingdom. The yak herders there live two weeks on foot from the nearest road.

Above the treeline, day 9

At this altitude the world shrinks to essentials: breath, weight, weather, and light that makes you forget all three.

Camp beneath the Milky Way

The days had a monastic rhythm. Porridge in the dark, eight hours of walking, camp before the cold. Some nights the sky did this, and the whole exhausted camp stood outside in down jackets, saying nothing.

This is the story of a mountain kingdom in its last quiet decade, told through the people who walk it, the villages that endure it, and the passes that decide who gets through.