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Altitude checker Choose a trek or high tour to see where you sleep each night and how fast the itinerary climbs. Nights that rise more than 500 m above 3,000 m are flagged.
Everest Three Passes Trek 20 Days 5,644 mAltitude zone: above 2,500 m Very high: above 5,000 m 0 1,000 2,000 3,000 4,000 5,000 6,000 Day 1 · Kathmandu · 1,400 m 1 Day 2 high point 2,860 m Day 2 · Phakding · 2,610 m Day 3 · Namche Bazaar · 3,440 m 3 Day 4 high point 3,880 m Day 4 · Namche Bazaar · 3,440 m Day 5 · Tengboche or Deboche · 3,867 m 5 Day 6 · Dingboche · 4,410 m Day 7 · Chhukung · 4,730 m 7 Day 8 high point 5,550 m Day 8 · Chhukung · 4,730 m Day 9 high point 5,535 m Day 9 · Lobuche · 4,940 m 9 Day 10 high point 5,364 m Day 10 · Gorak Shep · 5,164 m Day 11 high point 5,644 m Day 11 · Lobuche · 4,940 m 11 Day 12 high point 4,940 m Day 12 · Dzongla · 4,830 m Day 13 high point 5,420 m Day 13 · Thangnak · 4,700 m 13 Day 14 · Gokyo · 4,790 m Day 15 high point 5,357 m Day 15 · Gokyo · 4,790 m 15 Day 16 high point 5,360 m Day 16 · Lungden · 4,380 m Day 17 high point 4,380 m Day 17 · Thame · 3,820 m 17 Day 18 high point 3,820 m Day 18 · Namche Bazaar · 3,440 m Day 19 high point 3,440 m Day 19 · Lukla · 2,860 m 19 Day 20 high point 2,860 m Day 20 · Fly to Kathmandu · 1,400 m 20 5,644 m Day
2 days sleep more than 500 m higher than the night before, above 3,000 m. That is common on fast itineraries; ask us about an extra acclimatisation day.
Night-by-night sleeping altitude
Day Overnight Sleep Change High point Note 1 Kathmandu 1,400 m – 2 Phakding 2,610 m +1,210 m 2,860 m OK 3 Namche Bazaar 3,440 m +830 m Gain above 500 m over 3,000 m 4 Namche Bazaar 3,440 m – 3,880 m OK 5 Tengboche or Deboche 3,867 m +427 m OK 6 Dingboche 4,410 m +543 m Gain above 500 m over 3,000 m 7 Chhukung 4,730 m +320 m OK 8 Chhukung 4,730 m – 5,550 m OK 9 Lobuche 4,940 m +210 m 5,535 m OK 10 Gorak Shep 5,164 m +224 m 5,364 m OK 11 Lobuche 4,940 m -224 m 5,644 m OK 12 Dzongla 4,830 m -110 m 4,940 m OK 13 Thangnak 4,700 m -130 m 5,420 m OK 14 Gokyo 4,790 m +90 m OK 15 Gokyo 4,790 m – 5,357 m OK 16 Lungden 4,380 m -410 m 5,360 m OK 17 Thame 3,820 m -560 m 4,380 m OK 18 Namche Bazaar 3,440 m -380 m 3,820 m OK 19 Lukla 2,860 m -580 m 3,440 m OK 20 1,400 m -1,460 m 2,860 m
Altitude sickness basics
Acute mountain sickness (AMS) can start above about 2,500 m, whatever your age or fitness.
Know the symptoms
Headache, with loss of appetite or nausea
Unusual tiredness or weakness, dizziness
Poor sleep
Climb slowly
Above 3,000 m, raise your sleeping altitude by no more than about 500 m a night
Take a rest day every three to four days, or for every 1,000 m gained
Climb high, sleep low: a short walk up in the afternoon, then sleep lower
Drink water, eat well and skip alcohol for the first days up high
Go down if it gets worse
Never go higher with symptoms; rest at the same height until they pass
If symptoms worsen, descend at once, even at night
Confusion, stumbling, breathlessness at rest or a wet cough are emergencies: descend and get medical help
General information, not medical advice. See a doctor before a high trip, especially with a heart or lung condition, and ask about acetazolamide. Check that your insurance covers helicopter rescue to the altitude you will reach.
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