Mountains Crazy Expedition Oxygen Shortage

Mountain Madness’s oxygen shortage turned a planned summit bid into a tightly constrained operation: the team had enough oxygen for one attempt only if the climb and descent went close to schedule, with little reserve for delay or emergency. On May 10, the plan’s slim margins met a stalled route, dispersed climbers, and deteriorating conditions; by evening, even Boukreev’s attempts to find oxygen for rescue were hampered by its absence or uncertain location. The next morning, the depleted supply helped compel the team’s retreat.

Planning the Supply

Oxygen concerns were part of a broader set of equipment and coordination problems. Martin Adams criticized the expedition’s old ten-channel radios, which he considered inadequate for keeping climbers connected to Base Camp as they moved toward the summit. The radios mattered to the oxygen plan as well as to general safety: the strategy depended on climbers and guides being able to coordinate a long ascent, a descent, and the pickup of cached bottles.

Before the expedition, Fischer and Boukreev agreed that Boukreev would guide without oxygen if he were properly conditioned and acclimatized. The arrangement rested on a different allocation for the clients: Fischer planned to provide each with three canisters, understood as eighteen hours of oxygen, for a midnight departure, a summit bid, and a return to Camp IV by 6:00 P.M. Boukreev’s role was partly defined by what that plan assumed might go wrong: if clients were delayed or ran short, he could bring them oxygen, hot drinks, or physical assistance. The oxygen-free guide was therefore not evidence that the clients’ supply was abundant; his rescue role was part of the contingency plan for a supply whose margin depended on getting back on time.

What Was Available at Camp IV

At Camp IV, the Mountain Madness team had sixty-two canisters: nine heavier Zvesda bottles and fifty-three lighter Poisk bottles. This represented 51 percent by volume of the oxygen purchased from Henry Todd; most of the remainder had already been used, especially by Pete Schoening and Ngawang Topche Sherpa, while a small amount was kept at Base Camp for medical emergencies. The nine Zvesda canisters were reserved for sleeping before the summit attempt, leaving the Poisk supply for the climb itself.

The climbing Sherpas’ load included twenty-one bottles taken up from Camp IV. Five of the six Sherpas planned to climb with oxygen; Lopsang Jangbu Sherpa climbed without it but carried one bottle for emergency use, while each of the other five carried two for personal use and two more for clients and guides. The six clients, Fischer, and Beidleman carried two bottles each, while Boukreev carried one. Together, guides and clients carried seventeen bottles. Once the Sherpas’ and climbers’ loads were counted, thirty-eight Poisk canisters went up the mountain, leaving fifteen full Poisk bottles at Camp IV, along with whatever remained of the Zvesda supply used overnight.

That remainder did not provide a meaningful second attempt. If complications forced the climbers to stay above Camp IV overnight, the team lacked enough oxygen to support another summit bid on May 11. Fox and Madsen had already been told that it was one attempt, no more: the practical decision was May 10 or not at all.

The Schedule Behind the Calculations

The plan’s apparent sufficiency depended on Todd’s estimates. At a flow rate of two to two and a half liters per minute, he estimated that each Poisk canister would last six hours. Two bottles, he advised, should provide twelve hours—enough, on paper, to climb from Camp IV to the summit and descend to the South Summit, where climbers were to collect a third cached canister.

The schedule was similarly conditional. Leaving at midnight, climbers could expect to reach the summit in ten or eleven hours if the weather held and no complications arose. At Todd’s suggested flow rate, they would have one or two hours of oxygen remaining at the summit. The descent to the South Summit was estimated at forty-five minutes to an hour; there, the third bottle was meant to supply another six hours, enough to return to Camp IV if everything went as planned. The plan thus joined oxygen duration to pace, weather, route access, and the availability of the cache. A delay in one part of the climb reduced the safety margin in the others.

But the route did not proceed as the clients had been led to expect. Climbers from both Fischer’s and Hall’s expeditions understood that their Sherpas would leave ahead of them to fix the ropes between Camp IV and the summit, so the groups could advance without waiting. In fact, no Sherpas had gone ahead to do so. The subsequent bottleneck left climbers strung between the Balcony and the South Summit. At 10:30 A.M., many were on their second canister, with only one or two hours remaining at the recommended flow rate, while the third bottles had not yet reached the South Summit. The Sherpas carrying those supplies were also caught between the Balcony and the South Summit. The delay converted the plan’s calculated reserve into an immediate vulnerability.

Shortage During the Storm and Retreat

The oxygen problem did not end with the summit schedule. During the emergency, Boukreev believed fifteen Poisk canisters had remained at Camp IV and had already received three, so he expected more to be available. Pemba told him there was no oxygen. Boukreev searched for support as reports indicated that Sandy Hill Pittman might be in serious trouble, but he was told that no one had found another supply. He later described having his mask and regulator but no bottle, while other people had only one bottle apiece. He eventually took a bottle from Lopsang Jangbu Sherpa, who was using oxygen, and continued trying to organize help.

The accounts of the supply at Camp IV and of Boukreev’s search reveal different parts of the same problem: a bottle counted in the plan was not necessarily available, located, or ready when a rescue required it. Radio messages were routed through several Sherpas between Base Camp and Camp IV, and Dr. Hunt believed the information she received was incomplete or altered to present a more reassuring picture. With no radio issued to Boukreev or Beidleman under Fischer’s summit strategy, the distribution of oxygen and the changing needs of climbers were difficult to coordinate across the mountain.

On the morning of May 11, Mountain Madness’s oxygen supply was depleted. Beidleman and the clients decided to retreat, and the few clients who needed oxygen on the descent received it from the IMAX/IWERKS expedition, which came to their aid. The shortage therefore had a concrete consequence beyond the previous day’s delays: it closed off another summit attempt and made the descent dependent, in part, on assistance from another expedition. What had looked sufficient in the calculations was sufficient only under favorable assumptions; once delays and rescue needs accumulated, the remaining supply could not absorb them.