The Himalayas, Understood Through Generations.
Private expeditions to Nepal's greatest peaks, organised by the Sherpa house that has worked this terrain since 1987. Routes change, seasons turn — the knowledge only compounds.
Many seek and climb these majestic mountains. We come from them.
Thamserku was founded in Kathmandu in 1987, among the pioneering generation when Sherpa families reclaimed their heritage and began leading expeditions under their own names rather than carrying loads under someone else's.
In the four decades since, this house has organised over 800+ expeditions across 66 summits. From speed records and first ascents to quiet private climbs and moments that entered mountaineering history, we have learned what the mountains permit and what they punish.
This knowledge, accumulated through experience, cannot be found in manuals. It resides within the people who have spent four decades on the high frontier and accompanies every expedition we lead.
We move fast where the mountain allows it. We slow down where safety demands it.
Our goal is to deliver adventure at its fullest intensity, backed by the people, infrastructure, and discipline that high altitude demands.
Thirteen Peaks. One Standard.
From the highest point on Earth to the unclaimed summits that go seasons without an ascent. Each expedition in the Atlas is organised with precision to the same standard. While the routes may differ, the discipline does not.
Everest
'Sagarmatha', where the world ends and the sky begins. The summit against which all others are measured.
Lhotse
Everest's sterner neighbour. A summit that rewards the competent and persistent.
Manaslu
Smart start toward greatness
Ama Dablam
The most beautiful challenge. A technically demanding summit earned through discipline.
Himlung
The quiet seven-thousander. A pristine climb into the restricted Nar Phu valley.
One mountain. Five ways to climb it.
An edition is not a price level. It is a climbing philosophy. A decision about what level of arrangements you're confident to execute on your own and what level of support do we offer to make your journey comfortable.
Alpine Edition
A
Lean
Bespoke Edition
B
Personalized
Crafted Edition
C
Peak-Performance
Definitive Edition
D
Flagship
Explorer Edition
E
Exploratory
04 — SINCE 1987
Four decades on the high frontier.
The record below is not embellished for grandeur nor for promotional purposes. In the Himalayas, reputations are not proclaimed; they are earned through grit, perseverance, and years of hard-won experience. One expedition at a time, our legacy was quietly written through permit files, summit logs, and the trust of climbers from 42+ nations who placed their highest ambitions in our hands.
The First Season
Thamserku opens with expeditions to Dhaulagiri I, Pumori, and Sita Chuchura. To start at the technical end of the Himalaya is no small undertaking. It demands exceptional skill, unwavering discipline, and a depth of understanding of the mountains few first-year operators ever bring.
The Fastest Ascent
In its first full year, Marc Batard's record-breaking speed ascent of Everest was organised through Thamserku, making it the fastest ascent the mountain had ever witnessed. A record that stood for nearly a decade, and a signal of what the company was built to enable with the team from the early days.
Pasang Lhamu Sherpa
Pasang Lhamu Sherpa became the first Nepali woman to stand on the summit of Everest, climbing on an expedition organised through Thamserku in 1993. Her ascent became a defining moment in Nepal's mountaineering history and her legacy continues to inspire generations of climbers who follow.
Skis from the Summit
Hans Kammerlander set the record for the fastest ascent and return from Everest, while also completing the first ski descent from its summit. Organised through Thamserku, the ascent stands as a benchmark for what is possible when world-class alpinism meets ground operations built specifically for this feat.
78 Expeditions
Thamserku's highest operational year, with 78 expeditions coordinated across Nepal's ranges in a year across 2 seasons. A volume that demanded ground teams, permits, and logistics chains running in parallel across multiple massifs — and a benchmark the company has built on ever since the founding days.
The Pause
Thamserku steps back from active operations in a deliberate dormancy through the pandemic years between 2020 and 2023 and the industry upheaval that followed, holding the standards of the original company intact rather than compromising them under the weight of a market in deep and prolonged flux.
The Return
After a deliberate pause of 5 years, Thamserku returns under a new generation of leadership, backed by the Yeti Group's infrastructure and built on the operational standard the original company was known for across nearly four decades of expeditions on Nepal's most demanding mountains.
05 — THE UNCLAIMED
Some summits still await a first ascent.
Nepal still holds peaks without a recorded ascent, and Thamserku has spent decades moving among them. This house has led first ascents of Kanta Gaton, opened new routes on Kangtega's Northeast Face and Dome Kang, and ventured into ranges beyond the reach of ordinary maps. If your ambition is a line yet to be drawn, the conversation begins here.
Begin with knowledge. Move with respect.
Every expedition Thamserku has ever organised began the same way: a conversation about what you want from the mountain, and an honest answer about what it will ask of you in return.