• Distance: 216 miles (347 kilometres)
• Duration: 25 to 30 days
• Start point: Shana
• End point: Sephu or Bumthang
• Difficulty: Strenuous

If you’re looking for a serious trekking challenge, the Snowman Trek is Bhutan’s big beast. It’s long, high, and remote – a proper expedition through some of the most isolated terrain in the Himalayas. I’ve done it myself, and it’s easily one of the hardest treks I’ve ever been on. But it’s also one of the most rewarding: for the landscapes, the rare cultural encounters, and the sheer sense of scale and solitude.

The trek starts near Paro and winds eastwards along Bhutan’s northern border, with most itineraries ending in either Bumthang or Sephu. I’d recommend the Sephu route for most – it’s slightly shorter and less punishing towards the end, but still includes all the scenic and cultural highlights. Expect to be away for close to a month, with around 20 to 25 days of trekking, depending on your pace and weather conditions.

Each day follows a rhythm: long climbs to high-altitude passes (some over 5,000m), then descents into remote valleys where you camp for the night. Daily distances can reach 16–20km, often at sustained altitude. Nights are spent camping in rugged terrain, along glacial rivers, open alpine meadows, or at the edge of extremely remote villages. Even in the best weather, it’s cold and unpredictable, and the physical and mental demands are constant.

But the rewards more than match the effort. On a clear day at Sinche La or Loju La, you get vast panoramas of the Eastern Himalayas – even the chance to glimpse Gangkar Puensum, Bhutan’s highest and most sacred peak. The alpine scenery is extraordinary, and there are moments of real stillness: watching dawn light catch on the surface of Tshorim Lake, or crossing a silent, snow-covered pass with no sign of human life for miles around.

What sets the Snowman apart from other high-altitude treks, though, is the cultural element. In Laya, you meet the Layap people – easily recognised by their distinctive pointed bamboo hats – who still live in close rhythm with the land. Further east, the village of Lunana is one of the most isolated human settlements on Earth. Reaching it is a challenge, but it’s also a rare privilege. You’ll pass through Thanza, the largest village in Lunana, where you’ll spend two nights recovering and have the opportunity to chat with locals. It’s not a polished experience, it’s authentic, rustic and all the more memorable for it.

Need to know

You’ll need to be properly prepared for the Laya-Gasa trek. I’d strongly recommend going in the autumn (late September to mid-October) for stable weather and clearer views. Spring can be beautiful too, but snow lingers longer on the high passes. Having the correct geat matters – expect temperatures well below freezing, so bring insulated clothing, a high-spec sleeping bag, and boots that can handle tough, wet, and icy terrain.

As with all treks in Bhutan, you'll need to be part of a licensed organised tour. They will build in rest days into the itinerary, and will provide all equipment and logistics. For meals expect red rice, vegetables, simple meat stews, and staples like ema datshi (chilli cheese).

If you’re intrigued by this part of Bhutan but not ready for a full month on the trail, the Laya-Gasa Trek offers a shorter, more accessible route that still delivers on scenery and cultural encounters, including time in Laya itself.