Quick Answer
Before booking a Three Passes Trek in 2027, confirm in writing at least 2 contingency buffer days, a backup route for each pass if closed by weather (Renjo La via Bhote Koshi valley, Cho La via Phortse, Kongma La via Dingboche), a high altitude evacuation plan with helicopter coverage to 5,600m, group emergency oxygen, a guide with at least 3 prior Three Passes completions, and a written acclimatization schedule with rest days at Namche, Dingboche and Gokyo. Expect $2,400 to $3,400 per person for 18 to 21 days.
Detailed Breakdown
The Three Passes Trek crosses three high passes above 5,300m: Renjo La at 5,360m, Cho La at 5,420m and Kongma La at 5,535m. Each can close for 1 to 3 days in fresh snow or whiteout cloud, so contingency planning is the most important booking conversation.
The classic route is 18 to 21 days and forms a loop through the Khumbu, Gokyo Valley and Imja Tse valleys. Because the loop is long, missed pass windows cascade into missed flights home.
Altitude is the other factor. With three passes above 5,300m and several nights above 4,500m, acclimatization must be deliberate, not aspirational.
Cost / Component Breakdown
| Item | Inclusion | Cost Per Person |
|---|---|---|
| Kathmandu hotels | 3 nights B&B | $150 to $220 |
| Lukla flights both ways | Included | $360 to $440 |
| Permits (Sagarmatha, Khumbu Rural, TIMS) | Included | $50 to $65 |
| Lodges and meals 18 nights | Full board | $680 to $900 |
| Guide and assistant 20 days | 1 plus 1 for 6 plus | $420 to $560 |
| Porter team 20 days | 1 per 2 trekkers | $420 to $560 |
| Contingency buffer days 2 | Lodges and meals | $70 to $100 |
| Emergency oxygen and kit | Included | $15 to $25 |
| Total per person | 18 to 21 days, group of 4 | $2,400 to $3,400 |
What Affects the Answer
Season drives pass closure frequency. October and November see fresh snow on one of the three passes roughly every 2 weeks. March and April have similar risk, while December crossings are reliable in good weather but bitterly cold.
Guide experience is critical. A guide who has crossed all three passes at least three times can read conditions and decide whether to push or wait. Generic Khumbu guides without Three Passes experience should be avoided.
Insurance coordination matters. Helicopter evacuation from Gokyo, Lobuche or Dingboche costs $2,500 to $4,500, so insurance that pays helicopters direct is essential.
Booking Tips / Practical Advice
Get the pass closure contingency plan in writing. Ask specifically what happens if Kongma La is closed for 2 days: do you reroute via Dingboche, or wait at Lobuche?
Confirm at least 2 buffer days in the itinerary, ideally placed before and after the Cho La crossing because it is the most weather sensitive of the three.
Buy expedition insurance that covers trekking to 5,600m and helicopter evacuation. Confirm the policy pays helicopters direct, not as reimbursement, because upfront helicopter costs exceed most trekker credit card limits.
Comparison With Alternatives
Compared with the Renjo La Pass Trek only, the Three Passes is roughly double the duration and adds the Cho La and Kongma La crossings, so contingency planning is more complex. Compared with the Everest Base Camp Trek, the Three Passes is more committing and harder to shortcut.
For trekkers wanting a full Khumbu loop, the Three Passes is the definitive route, but the booking conversation must reflect the complexity.
Common Mistakes to Avoid
Do not book the Three Passes without buffer days. Pass closures are common and a tight itinerary fails. Do not assume any Khumbu guide knows all three passes.
Avoid operators who cannot produce a written pass closure contingency. Avoid skipping expedition insurance, because helicopter evacuation is expensive and frequent.
Frequently Asked Questions
How often do the Three Passes close? Collectively, one of the three passes closes roughly every 2 weeks in October and November, usually for 1 to 2 days.
How many buffer days should I include? At least 2, ideally placed before and after the Cho La crossing.
What is the backup if Kongma La is closed? Reroute via Dingboche and climb Nangkartshang Peak instead, then continue to Lobuche.
What altitude should insurance cover? At least 5,600m to give a buffer above Kongma La at 5,535m.
Summary
Three Passes Trek bookings must include 2 buffer days, written backup routes for each pass, helicopter evacuation to 5,600m, emergency oxygen and a guide with 3 plus prior completions. Expect $2,400 to $3,400 per person for 18 to 21 days in 2027.
Buy expedition insurance and confirm the pass closure contingency in writing before paying deposit.
Conclusion
The Three Passes Trek is one of Nepal most committing trekking routes and the booking conversation must reflect that. We recommend only operators who provide a written pass closure contingency, 2 buffer days, and a guide with at least three prior Three Passes completions.
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