Crevasses on Mount Everest vary significantly in depth, typically ranging from 20 to 100 feet (6 to 30 meters), though some can exceed these measurements. The most treacherous crevasses are found in the Khumbu Icefall, located between Base Camp and Camp I on the south side of Everest, where they can plunge 50 feet or deeper and are often hidden beneath thin snow bridges that collapse under a climber's weight.
The exact depth depends on several factors: the age and structure of the glacier, the rate of ice flow, seasonal variations, and the specific location on the mountain. Crevasses form where glacial ice experiences stress and fractures, creating deep cracks that can be nearly impossible to see when covered by fresh snow. This concealment makes them particularly dangerous—climbers may step onto what appears to be solid ground only to break through into an unseen chasm.
Everest expeditions use fixed ropes, ladders, and teams of Sherpas to establish safe routes through crevasse fields. Climbers are typically roped together in groups so that if one person falls into a crevasse, others can potentially arrest the fall and assist in rescue. Despite these precautions, crevasse accidents remain a significant hazard on Everest, particularly in the Khumbu Icefall, where the combination of extreme depth and constant ice movement creates unpredictable and life-threatening conditions. The danger is compounded by altitude, thin air, and the physical exhaustion that affects a climber's ability to react quickly.