Day-by-day altitude progress
Day 01: Flight from Kathmandu (1,324 m / 4,343 ft) or Manthali (474 m / 1,555 ft) to Lukla (2,860 m / 9,383 ft), then trek to Phakding (2,610 m / 8,563 ft).
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Altitude Gain: 1,536 m / 5,039 ft (Kathmandu to Lukla) / 2,386 m / 7,828 ft (Manthali to Lukla).
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Altitude Loss: 250 m / 820 ft (Lukla to Phakding).
Day 02: Trek from Phakding (2,610 m / 8,563 ft) to Namche Bazaar (3,440 m / 11,286 ft).
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Altitude Gain: 830 m / 2,723 ft.
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Altitude Loss: 0 m / 0 ft.
Day 03: Acclimatization day in Namche Bazaar (3,440 m / 11,286 ft), with a side hike to Everest View Hotel (3,880 m / 12,730 ft) or Khumjung Village (3,790 m / 12,434 ft), then return to Namche.
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Altitude Gain: 440 m / 1,444 ft (Everest View Hotel) / 350 m / 1,148 ft (Khumjung Village).
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Altitude Loss: 440 m / 1,444 ft (Everest View Hotel) / 350 m / 1,148 ft (Khumjung Village).
Day 04: Trek from Namche Bazaar (3,440 m / 11,286 ft) to Tengboche (3,860 m / 12,664 ft) or Milunga (3,937 m / 12,917 ft).
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Altitude Gain: 420 m / 1,378 ft (Tengboche) / 497 m / 1,631 ft (Milunga).
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Altitude Loss: 0 m / 0 ft.
Day 05: Trek from Tengboche (3,860 m / 12,664 ft) or Milunga (3,937 m / 12,917 ft) to Dingboche (4,410 m / 14,469 ft).
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Altitude Gain: 550 m / 1,805 ft (from Tengboche) / 473 m / 1,552 ft (from Milunga).
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Altitude Loss: 0 m / 0 ft.
Day 06: Acclimatization day in Dingboche (4,410 m / 14,469 ft), with a short hike to Nakarsang Hill (5,083 m / 16,677 ft), then return to Dingboche.
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Altitude Gain: 673 m / 2,208 ft.
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Altitude Loss: 673 m / 2,208 ft.
Day 07: Trek from Dingboche (4,410 m / 14,469 ft) to Lobuche (4,940 m / 16,207 ft).
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Altitude Gain: 530 m / 1,739 ft.
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Altitude Loss: 0 m / 0 ft.
Day 08: Trek from Lobuche (4,940 m / 16,207 ft) to Everest Base Camp (5,364 m / 17,598 ft), then return to Gorak Shep (5,164 m / 16,942 ft).
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Altitude Gain: 424 m / 1,391 ft.
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Altitude Loss: 200 m / 656 ft (Everest Base Camp to Gorak Shep).
Day 09: Hike from Gorak Shep (5,164 m / 16,942 ft) to Kala Patthar (5,545 m / 18,192 ft), return to Gorak Shep, then descend to Pheriche (4,240 m / 13,911 ft) or Somare (4,010 m / 13,156 ft).
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Altitude Gain: 381 m / 1,250 ft (Gorak Shep to Kala Patthar).
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Altitude Loss: 1,315 m / 4,314 ft (to Pheriche) / 1,545 m / 5,069 ft (to Somare).
Day 10: Trek from Pheriche (4,240 m / 13,911 ft) to Namche Bazaar (3,440 m / 11,286 ft).
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Altitude Gain: 0 m / 0 ft (net elevation).
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Altitude Loss: 800 m / 2,625 ft.
Day 11: Trek from Namche Bazaar (3,440 m / 11,286 ft) to Lukla (2,860 m / 9,383 ft).
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Altitude Gain: 0 m / 0 ft (net elevation).
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Altitude Loss: 580 m / 1,903 ft.
Day 12: Early morning flight from Lukla (2,860 m / 9,383 ft) to Kathmandu (1,324 m / 4,343 ft) or Manthali (474 m / 1,555 ft).
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Altitude Gain: 0 m / 0 ft.
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Altitude Loss: 1,536 m / 5,040 ft (Kathmandu) / 2,386 m / 7,828 ft (Manthali).