Mount Everest climbers face an unexpected obstacle as the spring climbing season gets underway. A massive, unstable ice block has halted ascent attempts just above base camp, leaving hundreds of permit holders in limbo.
The serac, described as roughly the size of a 10-story building, is located in the Khumbu Icefall above South Base Camp and nearly 1,000 feet below Camp One. Officials declared it unsafe on April 24, 2026, after Icefall Doctors first discovered the hazard on April 10 and determined it could collapse onto the route.
This development comes at a critical time in the climbing calendar. The Mount Everest climbing season runs from April to May, when weather conditions are optimal for reaching the 29,032-foot summit. The route typically opens by the third week of April, but this year’s ascent has been stalled by the unstable ice formation.
According to Nepal’s Department of Mountaineering, 410 foreign climbers have been issued permits to attempt the Everest summit during the spring season, which ends at the end of May. Among those waiting at base camp are 98 climbers from China, 49 from the United States, and 46 from India.
The Icefall Doctors, elite Sherpa guides responsible for preparing the climbing route each spring by setting ropes and securing aluminum ladders over crevasses, normally complete their operate by mid-April. This year, they are unable to proceed due to the dangerous serac.
Officials are working with climbers and expedition organizers to assess the situation. The Sagarmatha Pollution Control Committee plans to evaluate the serac by aerial survey. Committee Chairman Lama Kazi Sherpa stated they are waiting for the serac to melt down on its own to a safe level, citing high avalanche risk.
The Khumbu Icefall itself lies at an elevation of 5,486 metres (17,999 ft) on the Nepalese slopes of Mount Everest, not far above Base Camp and southwest of the summit. It is regarded as one of the most dangerous sections of the South Col route to Everest’s summit due to constantly shifting ice, hidden crevasses, and overhanging seracs that can collapse with little warning.
Glacial movement in the area creates extreme hazards. The Khumbu Glacier moves an estimated 0.9 to 1.2 metres (3 to 4 ft) down Everest’s flank daily. Ice entering the fall takes approximately 4.3 years to emerge at the base, which is 600 metres (2,000 ft) lower and 1.5 kilometres (1 mi) away horizontally.
As these initial glacial segments descend, they are twisted and crushed by glacial flow, creating increasingly complex crevasse fields. Snow bridges concealing crevasses and overhanging ice blocks (seracs) ranging from several tons to thousands of tons can open or collapse without warning, generating extreme danger for climbers.
Expedition leaders are exploring alternatives although waiting for natural resolution. Garrett Madison of U.S.-based Madison Mountaineering told Reuters from base camp that expeditions are all being delayed due to the impasse. Safety specialists may need to find an alternate route or wait for the serac to melt enough to collapse on its own.
The blocked route has significant implications for Nepal’s mountaineering industry. Mountain climbing is a major source of income and employment for the country, home to eight of the world’s 14 highest peaks. Permits for Everest ascents cost $15,000 each this season.
For now, hundreds of climbers and their guides remain at base camp, unable to move up the mountain as officials monitor the unstable ice formation. The climbing community awaits word on whether the serac will stabilize naturally, require route modification, or force further delays in this year’s Everest ascent attempts.
The next official update on the situation is expected from Nepal’s Department of Mountaineering as they continue to assess the serac’s stability and work with expedition teams on potential solutions.
Stay tuned to Archysport for continuing coverage of developments on Mount Everest as this story unfolds.
