Most people research the Everest Base Camp elevation profile looking for one number — the highest point. Fair enough, that’s the headline stat. But the number that actually decides whether you enjoy this trek or suffer through it isn’t the peak altitude. It’s how you get there — how many nights your body spends adjusting at each level before you ask it to go higher. Get that part right, and 5,545m feels demanding but doable. Get it wrong, and even 4,000m can knock you flat.
Kala Patthar, at 5,545m, is the highest point you’ll stand on. Gorak Shep, at 5,160m, is the highest place you’ll sleep. Between Lukla and Kala Patthar, you’re climbing 2,685m over 9 trekking days — one of the more gradual, well-paced altitude profiles of any major Himalayan route. This guide walks through every altitude on the way, the science behind why the schedule is built the way it is, and what each stage actually feels like once you’re standing in it.
What’s Inside This Guide
- Key Altitudes on the Route
- Day-by-Day Altitude Table
- Why the Acclimatisation Schedule Works
- What Each Altitude Feels Like
- AMS Risk by Stage
- FAQs
- Related Planning Guides
Everest Base Camp Trek Elevation — Key Altitudes
| Location | Altitude | Role in the Trek |
|---|---|---|
| Kathmandu | 1,400m | Where you land, where the trek technically begins |
| Lukla | 2,860m | Trek start — the flight alone gains 1,460m |
| Phakding | 2,610m | Day 1 overnight, deliberately lower than Lukla |
| Namche Bazaar | 3,440m | First acclimatisation stop, two nights |
| Tengboche | 3,870m | Monastery stop, your first night solidly above 3,500m |
| Dingboche | 4,410m | Second acclimatisation base, two nights |
| Nagarjun Hill (day hike) | ~5,100m | Higher than base camp itself — done as a day trip |
| Lobuche | 4,940m | Last teahouse before Gorak Shep |
| Gorak Shep | 5,160m | Highest overnight of the entire trek |
| Everest Base Camp | 5,364m | The destination — a day trip from Gorak Shep |
| Kala Patthar | 5,545m | The true high point — reached before dawn for sunrise over Everest |
Kathmandu sits at 1,400m. Kala Patthar sits at 5,545m. That’s a 4,145m climb from the city, spread across a short flight and nine days of walking. It’s deliberately slow. The two acclimatisation days at Namche and Dingboche aren’t there to pad the itinerary — they’re the actual mechanism that lets someone with zero prior altitude experience stand at 5,500m and function. Understanding this profile isn’t trivia. It’s the difference between a Gorak Shep night you sleep through and one you spend staring at the ceiling gasping for air. Budgeting for a helicopter option if altitude hits hard partway through? Check our full cost guide.
Day-by-Day Altitude Table
| Day | Overnight | Overnight Altitude | Day’s High Point | Net Change |
|---|---|---|---|---|
| 1 | Phakding | 2,610m | 2,860m (Lukla) | -250m |
| 2 | Namche Bazaar | 3,440m | 3,440m | +830m |
| 3 | Namche Bazaar | 3,440m | ~3,900m (acclimatisation hike) | 0m overnight |
| 4 | Tengboche | 3,870m | 3,870m | +430m |
| 5 | Dingboche | 4,410m | 4,410m | +540m |
| 6 | Dingboche | 4,410m | ~5,100m (acclimatisation hike) | 0m overnight |
| 7 | Lobuche | 4,940m | 4,940m | +530m |
| 8 | Gorak Shep | 5,160m | 5,364m (EBC) | +220m overnight |
| 9 | Pheriche | 4,240m | 5,545m (Kala Patthar) | -920m overnight |
| 10 | Namche Bazaar | 3,440m | 4,240m | -800m |
| 11 | Lukla | 2,860m | 3,440m | -580m |
| 12 | Kathmandu (flight) | 1,400m | — | -1,460m |
Every overnight altitude matters, since sleeping high is what actually drives your body to adapt. But two nights decide how the whole trek feels. Gorak Shep, at 5,160m on Day 8, is your first night above 5,000m — and it’s a strange one. Sleep gets shallow. Food loses its appeal. Your body works harder lying still than it did walking at 3,000m. Then before dawn on Day 9, you’re climbing to Kala Patthar at 5,545m, the highest you’ll likely ever stand. How that Gorak Shep night goes — how hydrated you are, how early you got to sleep, whether you actually followed the schedule instead of rushing it — decides how Kala Patthar feels the next morning.
Why the Acclimatisation Schedule Actually Works
Somewhere around 2,500m, your body notices the drop in oxygen and starts producing extra red blood cells to compensate. That process takes 48-72 hours to show meaningful results, and it keeps working for weeks after. Because of this, we build the EBC itinerary specifically around that timeline — we place every stop where the science says it needs to be, not where it happens to look scenic.
Namche Bazaar (3,440m), Days 2-3
Two nights here give your body a solid 48 hours above 3,000m. The Day 3 hike to roughly 3,900m follows the classic “climb high, sleep low” principle — you push your body to a higher altitude during the day, then come back down to sleep, which triggers adaptation without the risk. Namche is also the last properly-serviced town before the high Khumbu, so it’s the right place to sit an extra day if anyone’s showing symptoms. Trekkers who complete both Namche nights and the Day 3 hike arrive at Tengboche and Dingboche genuinely ready for what’s next.
Dingboche (4,410m), Days 5-6
This is the stop that actually determines whether Gorak Shep goes well. The Day 6 hike to Nagarjun Hill — about 5,100m, higher than base camp itself — exposes your body to that altitude for a few hours while you still sleep at 4,410m that night. We treat Day 6 as non-negotiable: we never shorten it, never swap it for a rest day, no matter how good everyone’s feeling. Simply put, it’s the single most important day for what comes after. For the full day-by-day difficulty breakdown, see our EBC difficulty guide.
What Each Altitude Threshold Actually Feels Like
Numbers don’t tell you what altitude actually does to a person. So here’s the honest version, stage by stage.
2,800-3,400m: Lukla to Namche
Most people notice almost nothing here beyond heavier breathing on the steeper climbs. The flight itself jumps you from 1,400m to 2,860m in about 30 minutes, so some people get a mild headache their first night at Phakding or Lukla. Drink water, take it slow, and it passes on its own. In short, this range rarely worries anyone.
3,400-4,000m: Namche to Tengboche
This is where altitude stops being background noise and becomes part of daily life. Stairs in the Namche teahouse suddenly feel like actual exercise. The walk out of Namche on Day 4 feels fine — but the arrival at Tengboche that afternoon feels noticeably different. Some people sleep poorly their first night above 3,500m. From Namche onward, 3-4 litres of water a day isn’t a suggestion — it’s the single most effective thing you can do to feel better.
4,000-5,000m: Dingboche to Lobuche
Above 4,000m your body runs at roughly 70-80% of sea-level oxygen efficiency, so every uphill step takes real, conscious effort. The landscape strips down to high-altitude desert with glaciers visible in the distance — genuinely beautiful, in a way that sneaks up on you between breaths. The climb above Dingboche toward the Everest memorial chortens is usually where people first slow to a shuffle. That’s not weakness. It’s simply what this altitude does to everyone, regardless of how fit they are.
Above 5,000m: Gorak Shep, EBC, Kala Patthar
Here your body manages a real oxygen deficit with every single breath. Appetite mostly disappears, and sleep stays thin and breaks easily. Even something as simple as lacing your boots takes deliberate effort. The trail between Gorak Shep and base camp crosses the Khumbu glacier moraine — loose boulder terrain that demands your full attention, not the kind of ground you want to cross half-asleep. Trekkers who arrive here well-hydrated and rested describe it as hard but manageable. Those who cut corners earlier describe it very differently.
AMS Risk by Stage
| Stage | Altitude Range | AMS Risk | What Actually Helps |
|---|---|---|---|
| Lukla to Phakding | 2,610-2,860m | Very low | Stay hydrated, nothing else needed |
| Namche Bazaar, 2 nights | 3,440m | Low-moderate | Complete the Day 3 acclimatisation hike |
| Tengboche to Dingboche | 3,870-4,410m | Moderate | 3-4L water daily, flag any persistent headache |
| Dingboche acclimatisation | Up to 5,100m by day | Moderate-high | Complete the Nagarjun Hill hike, no exceptions |
| Lobuche to Gorak Shep | 4,940-5,160m | High | Move slowly, arrive early, eat even without appetite |
| EBC and Kala Patthar | 5,364-5,545m | High (day visits) | No overnight above 5,160m, return to Gorak Shep same day |
We run a strict no-ascent-with-AMS policy on every departure. If anyone on the team shows real symptoms — a headache that won’t clear after water and paracetamol within two hours, nausea, breathlessness at rest, or any loss of coordination — descent starts immediately, no debate. We arrange helicopter evacuation from anywhere on the route within hours when it’s needed, and your travel insurance covers the cost. This isn’t a policy we keep on paper — our guides apply it on the trail every single season, and it comes before anything else. Full details here: Altitude Sickness on EBC.
Frequently Asked Questions
Kala Patthar at 5,545m, reached before dawn on Day 9 for sunrise over Everest. Base camp itself sits at 5,364m and is visited as a day trip from Gorak Shep on Day 8. The highest overnight is Gorak Shep at 5,160m — meaning two nights of this trek are spent above 5,000m, the most demanding stretch of the whole route.
Base camp at 5,364m sits higher than Mont Blanc’s 4,808m summit and above every peak in Europe, the Americas, and Antarctica under roughly 5,500m — Kilimanjaro’s 5,895m summit is one of the few that tops it. Kala Patthar, the actual high point of this trek at 5,545m, is even higher than base camp itself. Most EBC trekkers end up standing higher than Mont Blanc’s summit without touching a single piece of climbing gear.
Roughly two and a half days total — the Day 6 hike touches 5,100m as a day trip, Day 8 reaches base camp at 5,364m, the Gorak Shep overnight sits at 5,160m, and Day 9 tops out at Kala Patthar’s 5,545m before you descend. Every push above 5,000m happens as a day trip before the actual overnight, following “climb high, sleep low” the whole way through. No overnight on our itinerary ever sits above 5,160m.
Related Planning Guides
- EBC Trek Package — full 12-day trip, group rates from $1,039
- Altitude Sickness Guide — symptoms, prevention, treatment
- Day-by-Day Itinerary
- How Hard Is the Trek?
- EBC Trek Cost 2026
- Best Time to Trek
Understand the Altitude Before You Land, Not While You’re Gasping at 5,000m
The trekkers who struggle on this route usually aren’t the least fit ones — they’re the ones who treated the acclimatisation days as optional. Follow the schedule as it’s built, drink more water than feels necessary, and tell your guide the moment something feels off instead of pushing through quietly. The altitude was never really the obstacle. Cutting corners on the days built to prepare you for it — that’s the obstacle.
We’ve been guiding EBC since 2018, based here in Kathmandu, and altitude safety isn’t a policy we read off a page — it’s something our guides manage on the ground every single season. Ask us anything about the altitude profile, how your body’s likely to respond, or what our AMS protocol actually looks like in practice, and you’ll get an answer from people who’ve walked this route more times than they can count.
Package rates: $1,039 per person for 8-12 people, $1,089 for 5-7, $1,259 for 2-4, $1,379 solo. Lukla flights and both permits included every time. Helicopter evacuation arranged on request.
View the full Everest Base Camp Trek package →
Got a question about the altitude, your own readiness, or our AMS protocol? Message us on WhatsApp — we typically reply within 12 hours.