Why Mount Everest Requires Multiple High-Altitude Camps

The Staircase to the Summit

Climbing Mount Everest (8,848 m) is not a single push but a weeks-long, staged ascent. Multiple camps are essential for physiological, logistical, and safety reasons.

1. Altitude Acclimatization (The Core Reason)

Above 5,500 m, the body cannot acclimatize quickly. Climbers follow a "climb high, sleep low" rotation: ascend to a higher camp, spend a few hours, then descend to a lower camp to sleep. This stimulates red blood cell production and adjusts breathing. Fixed camps at progressive elevations make this protocol possible.

2. Base Camp (5,364 m / 17,598 ft)

Located on the Khumbu Glacier (Nepal side), this is the expedition headquarters: tents, dining, medical, communications, and gear storage. Teams spend weeks here before moving up.

3. Camp 1 (6,065 m / 19,898 ft) — "Sherpa Camp"

Perched above the treacherous Khumbu Icefall. Often used by Sherpas as a staging point for ferrying loads.

4. Camp 2 (6,500 m / 21,325 ft) — Advanced Base Camp (ABC)

On the Western Cwm, a broad glacial valley beneath the Lhotse Face. Major depot for oxygen, food, and fuel. Primary acclimatization hub.

5. Camp 3 (7,162 m / 23,500 ft) — Lhotse Face / South Col Approach

On a steep, icy slope. Cramped, exposed, and in the "Death Zone" threshold. Used for final acclimatization before the summit push.

6. Camp 4 (7,920 m / 26,000 ft) — South Col

The last camp before the summit. Climbers arrive, rest 6–12 hours on supplemental oxygen, then launch the 8–12 hour summit bid around midnight.

North Side (Tibet) Variation

North Col (Camp 1, ~7,000 m) → Camp 2 (~7,500 m) → Camp 3 (~8,300 m) → Summit. Different route, same multi-camp logic.

Additional Functions

• Rest/Recovery: Descending to lower camps between rotations restores energy.
• Oxygen/Equipment Depots: Critical supplies cached at each camp.
• Communications: Satellite phones, radios link team, base camp, and rescue.

Without this camp ladder, the physiological leap from Base Camp to summit would be fatal for nearly all climbers.