Cho Oyu Expedition

Autumn (late August to mid-October) is the single reliable season for Cho Oyu via the Tibet north-west face. September is the core month: the post-monsoon weather settles, the jet stream sits north of the summit and a typical summit window opens in early to mid-October. Most expeditions plan their summit push for the first stable period between 1 and 15 October.

Spring (April to May) is the second theoretical window, but the Tibet north-west face is less commonly attempted in spring because the jet stream targets the summit more persistently, making a stable window shorter and less predictable than in autumn. Winter is not viable for an open expedition. Swotah runs the Cho Oyu Expedition in autumn to maximise the chance of a summit window, and the season cards below show the month-by-month weather picture.

Cho Oyu via Tibet requires three main permits: the Chinese Mountaineering Association (CMA) climbing permit and royalty, the Tibet Travel Permit, and the Tibet Alien Travel Permit for the border areas. Costs change each season and are set by the CMA; current estimates for the CMA permit run to several thousand US dollars per climber, and a group liaision officer fee and environmental deposit are also required. The Chinese visa must be obtained in Kathmandu from the Chinese Embassy, typically three to four working days before departure.

On the Nepal side, there is no separate Nepal climbing permit because the Cho Oyu summit is fully in Tibet, but Swotah coordinates the Nepal-side logistics including the exit to Zhangmu and the re-entry into Nepal. All permit applications require a passport copy, two passport photos, and climbing curriculum vitae for each climber. Swotah handles all applications and confirms current fee structures before departure; the uncertain_facts note in the booking documents flags fees that are subject to annual revision.

The expedition uses a three-tier accommodation chain. Hotels in Kathmandu (2 nights on arrival, 1 night on return) and Lhasa (2 nights acclimatisation) are included in the package. From Chinese Base Camp onward, all accommodation is in expedition-quality four-season dome tents with foam sleeping mats; sleeping bags rated to at least -40 degrees C are required personal equipment.

Advanced Base Camp at approximately 5,700 m is a full cook tent, dining tent and individual climber tents. Camp 1 at approximately 6,400 m and Camp 2 at approximately 7,100 m are lightweight two-person high-altitude tents stocked by rotation carries. Camp 3 at approximately 7,500 m is the final staging camp for the summit push, equipped with oxygen, food and fuel. All high camp equipment, including fixed rope anchors and oxygen cylinders, is placed by the Sherpa team during rotations.

Three full meals are provided daily from Kathmandu to the return. At Advanced Base Camp and below, the expedition cook prepares warm, substantial meals: dal bhat, pasta, rice dishes, soups, porridge and fresh bread. Above Camp 1, climbers use pre-cooked or freeze-dried meals and hot drinks prepared on gas stoves inside the tent; Swotah pre-packs camp food for each high camp.

Water at altitude is made by melting snow on a gas stove. Dehydration accelerates altitude illness, so 3 to 4 litres per day is the minimum target. Electrolyte powder sachets and a personal water purification solution are in the expedition kit list. Alcohol dehydrates at altitude and is best avoided above Base Camp. At the Tibet roadside stops, bottled water and Tibetan restaurant food are available.

The standard approach leaves Kathmandu by private vehicle (bus or land cruiser convoy) to the Chinese border at Khasa/Zhangmu (approximately 2,300 m), a full-day drive of 8 to 9 hours via the Araniko Highway. The border crossing into Tibet requires a pre-arranged Tibet Travel Permit; the team clears customs together. From Zhangmu the road climbs to Nyalam and onward to Shigatse, then to Xegar/Tingri, the main staging town for Cho Oyu approaches.

From Xegar the convoy reaches Chinese Base Camp (approximately 4,800 m), from which yaks carry expedition loads two days up to Advanced Base Camp at 5,700 m. The return route retraces to Zhangmu and back to Kathmandu. Total driving time over the expedition is roughly 5 to 6 days each way. Swotah arranges all Tibet-side transport through its registered partner in Lhasa.

The Cho Oyu north-west face route begins at Advanced Base Camp (5,700 m) and follows a series of snow slopes and moderate ice fields to Camp 1 at approximately 6,400 m, then steepens to a broad ridge leading to Camp 2 at approximately 7,100 m. The crux is the summit pyramid above Camp 3 (7,500 m), a 700 m altitude gain on steeper snow and ice to the summit plateau at 8,188 m, typically completed in 6 to 8 hours from Camp 3.

Fixed ropes are installed on the technical sections by the Sherpa team before the first client rotation. Climbers ascend on a jumar and descend with a figure-of-eight or auto-blocking device; the ability to change devices quickly with mittens is a tested skill. Supplemental oxygen (typically 2 litres per minute on the carry to Camp 3, 3 litres per minute on summit day) is standard for non-professional climbers. Personal gear must include a two-shell glove system, a high-altitude suit, 8,000 m rated boots, and an oxygen mask and regulator compatible with Swotah's cylinder type (confirm on booking).

Three acclimatisation rotations are built into the schedule during the Days 16-39 climbing block. Rotation 1 climbs to Camp 1 (6,400 m) and returns to ABC; Rotation 2 climbs to Camp 2 (7,100 m) and returns; Rotation 3 pushes to Camp 3 (7,500 m) before a rest-day return to ABC. Each rotation is followed by a rest period at ABC to absorb altitude gains. The Sherpa team lays rope and stocks camps during the same period.

Summit day starts from Camp 3 (7,500 m) before midnight, targeting the summit plateau by mid-morning to allow a safe descent to Camp 2 or ABC before afternoon weather develops. The climb from Camp 3 takes 6 to 8 hours for most climbers; descent to Camp 3 then to Camp 2 takes a further 4 to 6 hours. All climbers are expected to turn around no later than a pre-agreed turnaround time regardless of how close the summit is. Swotah guides make the final call on summit day conditions.

Swotah's Cho Oyu expeditions are led by a licensed high-altitude climbing guide with at least one personal Cho Oyu or comparable 8,000 m summit. The Sherpa team includes one high-altitude Sherpa per client for the summit push, responsible for fixing rope on technical sections, stocking high camps and providing personal oxygen management assistance. Liaison officers required by the CMA accompany the group from Lhasa to Base Camp.

All Swotah expedition Sherpas hold Nepal Mountaineering Association (NMA) climbing certification, are covered by expedition insurance including emergency evacuation, and are paid at or above the NMA-recommended wage scale. A base camp manager coordinates logistics, satellite communications and weather forecasts from the Cho Oyu or Everest Base Camp weather service. Swotah provides a satellite phone for emergency use; personal satellite communicators (Garmin inReach or similar) are recommended.

Cho Oyu via Tibet sits in a sensitive high-altitude environment above the Tibet Autonomous Region. Swotah follows the CMA environmental deposit rules, requires all expedition waste to be carried down and deposited at the Chinese Base Camp collection point, and forbids the abandonment of oxygen cylinders or tent materials on the mountain. High-camp tent sites established by previous expeditions are used where possible rather than new ground being broken.

Tipping is customary for the Sherpa team, cook, kitchen crew, yak handlers and driver. A common guideline for a full-length Cho Oyu expedition is USD 500 to USD 800 per climber for the Sherpa team (split equally), plus smaller tips for kitchen and logistics staff. Tips are given in cash at the end of the expedition. Booking through a registered operator like Swotah means permit compliance, proper Sherpa wages, environmental obligations and summit insurance are handled from the start.