The best Everest Three Passes Trek season is October — post-monsoon clarity, the most reliable pass conditions of the year, and the most secure footing on the Cho La glacier. Meanwhile, April is the best spring month, with strong conditions across all three crossings and the rhododendron forests in full bloom on the lower approach. Specifically, this guide covers every month honestly so you can match your travel window to the right season on the circuit.
What’s Inside This Guide
- Season Overview
- Autumn — September to November
- Spring — March to May
- Winter — December to February
- Monsoon — Avoid
- Pass-by-Pass Season Notes
- Month-by-Month Quick Guide
- Frequently Asked Questions
- Related Guides
Everest Three Passes Trek Season — Overview at a Glance
| Season | Months | Pass Conditions | Views | Verdict |
|---|---|---|---|---|
| Autumn | Sept–Nov | Best — consolidated snow | Exceptional | ✅✅✅ Best overall |
| Spring | Mar–May | Good through April | Very good | ✅✅ Excellent |
| Winter | Dec–Feb | Hard ice — serious risk on Cho La | Extraordinary clarity | ⚠️ Experienced only |
| Monsoon | Jun–Aug | Dangerous — wet and unstable | Very poor | ❌ Do not attempt |
The short answer
October delivers the finest pass conditions, clearest mountain views, and the most reliable Cho La glacier footing of the year. For spring departures, April is the target — all three passes are reliable and the lower Khumbu trail is. Instead, avoid June, July, and August completely — wet passes, unstable glacier snow, and mountain views hidden behind.
Everest Three Passes Trek Season — Autumn (September to November)
Autumn is the finest overall Everest Three Passes Trek season. In fact, the post-monsoon atmospheric clearing brings the Khumbu into its sharpest weather window. Moreover, the Cho La glacier snow consolidates after the monsoon, making the glacier approach and descent the. Consequently, autumn consistently delivers the highest Three Passes circuit completion rates of any season.
September — The Monsoon Clears
September marks the monsoon’s end and the beginning of the trekking year. As a result, the lower Khumbu clears progressively through the month. Furthermore, the higher sections above Namche become reliably accessible from mid-September onward. However, the Cho La glacier may retain residual unstable snow in early September. For flexible-date trekkers, late September offers excellent conditions with far fewer teams on the circuit than October.
October — The Best Single Month
October is the peak of the Everest Three Passes Trek season and the finest single month for the circuit. In particular, post-monsoon air clarity is at its absolute best, all three passes are in their most consolidated and stable state. Furthermore, the panoramas from Kongma La, Kala Patthar, Gokyo Ri. Consequently, October fills Namche teahouses and exhausts guide availability faster than any other month.
November — Clarity With Fewer Trekkers
November delivers October’s post-monsoon clarity with significantly fewer teams on the circuit. Still, mountain views remain exceptional. Moreover, the pass conditions are still reliable through most of the month. However, temperatures drop noticeably — Kongma La and Renjo La summit temperatures reach -15°C to -20°C in November. Indeed, experienced trekkers who want the finest conditions without October’s competition will find November ideal.
Everest Three Passes Trek Season — Spring (March to May)
Spring is the second finest Everest Three Passes Trek season. Notably, the Khumbu warms through March and April, the rhododendron forests below Namche and on the Phakding approach come into full bloom. Additionally, spring delivers a different visual quality to the circuit. In short, spring suits trekkers who want strong circuit conditions combined with the sensory richness of the Himalayan spring season.
March — Early Season
March opens the season from winter cold and temperatures rise progressively through the month. Generally, the lower Khumbu trail is accessible. However, the Cho La glacier carries hard ice in early March. In fact, late-March conditions are noticeably more forgiving than early March. Consequently, trekkers without prior high-altitude experience on firm wintry terrain should target late March or April departures instead.
April — Best Spring Month
April is the finest spring month for the Three Passes circuit. At this point, all three passes are reliably accessible. Moreover, the Cho La glacier conditions are the most forgiving of the spring window. Moreover, April delivers the highest spring pass completion rates of any month and the most pleasant trail temperatures. That said, book early — guide availability and Namche teahouse beds fill quickly in mid-April across all Khumbu routes.
May — Late Spring Window
The first two weeks of May are a viable trekking window. Pass conditions remain good in early May. However, the weather window narrows from mid-month onward. Nevertheless, pre-monsoon cloud builds steadily from mid-May and afternoon storms above 5,000m become increasingly common from the second week onward. May departures should therefore be planned to complete all three pass crossings within the first 10–12 days of the itinerary.
Winter Season — December to February
Winter is not suitable for standard Three Passes circuit expeditions. In January and February, Kongma La and Cho La carry serious hard ice. Furthermore, summit temperatures on the passes reach -25°C to -30°C with wind chill. Moreover, Mountain Hike Nepal does not run scheduled winter Three Passes departures. As a result, any winter circuit requires a custom arrangement, a specific conversation about cold-weather alpine experience.
Monsoon Season — June to August (Do Not Trek)
The monsoon makes the Three Passes circuit both dangerous and unrewarding. In particular, wet snow and ice cover Kongma La, the Cho La glacier approach becomes unstable, and mountain views disappear behind cloud. Additionally, the trail becomes slippery at lower elevations and leeches appear on the forested sections below Namche. For this reason, Mountain Hike Nepal categorically does not run Three Passes departures during the monsoon season, regardless of fitness.
Everest Three Passes Trek Season — Pass-by-Pass Condition Notes
Each of the three passes has slightly different seasonal characteristics. Here is what to expect on each crossing by season:
| Pass | Altitude | Spring Conditions | Autumn Conditions | Microspikes Needed? |
|---|---|---|---|---|
| Kongma La | 5,535m | Hard snow in early March — firm and reliable from April | Best in October — ice building through November | Recommended in October–November and March |
| Cho La | 5,420m | Glacier firm in March, consolidating well through April | Most stable in October — most ice in November | Strongly recommended in all seasons |
| Renjo La | 5,360m | Reliably accessible from April — late March possible | Reliable in October and November | Occasionally needed in late November |
The key takeaway on the Cho La
The Cho La at 5,420m involves a glaciated approach and a fixed-rope descent. Unlike the other two passes, the Cho La glacier specifically varies more by recent weather than by calendar month alone. Furthermore, microspikes are strongly recommended for the Cho La in every season, not just winter. Accordingly, rent them in Kathmandu before the Lukla flight and confirm current glacier conditions with Mountain Hike Nepal at the time of booking.
Month-by-Month Quick Reference
| Month | Pass Conditions | Mountain Views | Circuit Rating |
|---|---|---|---|
| January | Hard ice on Cho La and Kongma La | Exceptional — crystal clear | ⚠️ Experienced only |
| February | Hard ice reducing late month | Excellent | ⚠️ Experienced only |
| March | Firm snow — late March most reliable | Very good | ✅ Good — late March preferred |
| April | Best spring conditions across all three passes | Excellent | ✅✅✅ Best spring month |
| May (early) | Good — pre-monsoon cloud building | Very good | ✅ First two weeks only |
| June | Wet and unstable — dangerous | Poor | ❌ Do not trek |
| July | Monsoon — very dangerous | Very poor | ❌ Do not trek |
| August | Monsoon — clearing late month | Very poor | ❌ Do not trek |
| September | Clearing — late September reliable | Good from late September | ✅ Late September good |
| October | Best of the year across all three passes | Exceptional | ✅✅✅ Best overall month |
| November | Very good — colder with more ice | Excellent | ✅✅ Excellent |
| December | Ice forming rapidly on Cho La | Exceptional — very cold | ⚠️ Experienced only |
Frequently Asked Questions
Overall, October is the single best month — post-monsoon atmospheric clarity at its peak, the most consolidated pass conditions of the year. Moreover, October delivers the highest circuit completion rates of any month on this route. Consequently, October departures need the earliest advance booking.
Not recommended for standard guided expeditions. In January and February the Cho La glacier carries serious hard ice, Kongma La and Renjo La reach -25°C or colder with wind chill. Furthermore, Mountain Hike Nepal does not run scheduled winter Three Passes departures. Any winter circuit is therefore a custom arrangement for trekkers with genuine cold-weather alpine experience.
Yes — microspikes are strongly recommended for every season on this circuit, specifically for the Cho La. October and November carry more ice on the Cho La than April, making autumn the season where microspikes matter most. Additionally, always confirm current pass conditions with Mountain Hike Nepal at booking and rent microspikes in Thamel. In terms of cost, renting for 18 days runs approximately USD 19–26.
Related Planning Guides
- Khumbu Circuit Package — Full 18-day expedition details and group pricing.
- Budget and Cost Guide — How season affects gear requirements and overall budget.
- Difficulty and Preparation — How season changes pass conditions and fitness needs.
- Full 18-Day Circuit Itinerary — Day-by-day guide with altitude and highlights.
- Khumbu Route Comparison — Three Passes vs EBC — which route suits your schedule.
Your Season. Your Passes. Your Khumbu.
The right Everest Three Passes Trek season is the month that aligns with your travel window, gives the most reliable conditions on all three passes, and puts the Khumbu in the sharpest possible light. October for the finest panoramas of the year. April for spring colour and strong pass conditions. November for clarity without crowds. Whatever month you choose, the passes look different — but the circuit delivers every time.
Mountain Hike Nepal has guided the Three Passes circuit across dozens of departures since 2018. We are a licensed local operator based in Kathmandu — not a booking platform or a middleman. Furthermore, when you contact us, you speak directly with the team that has crossed Kongma La, Cho La. Consequently, the seasonal advice you get is accurate, current, and based on real pass conditions.
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Still have questions about pass conditions for your specific travel month, Lukla flight timing, or which season suits your fitness level best? We respond within 12 hours and give straight answers.