Rainbow Valley on Everest: Why This Stretch of the Death Zone Has a Deceptively Beautiful Name

Rainbow Valley is the nickname climbers use for a stretch of Mount Everest's death zone on the mountain's north side, where the brightly colored down suits, tents, and oxygen bottles of climbers who died there remain visible against the rock and snow. The name has none of the softness it suggests.

• What it is: climbers' shorthand, not a name that appears on any official map.
• Where it is: Everest's north side, roughly 8,300 to 8,500 metres (27,230 to 27,890 feet), below the Northeast Ridge.
• Why the name: the brightly coloured down suits, tents and oxygen bottles of climbers who died there remain visible against the rock and snow.
• The death zone: begins at roughly 8,000 metres (26,247 feet), above which the human body cannot acclimatize.
• Who passes through it: every summit aspirant on the north side route.
• Relevance to trekkers: none. No Everest Base Camp trekking itinerary approaches this terrain.

Somewhere in the band of the mountain roughly 8,300 to 8,500 metres (27,230 to 27,890 feet) below the Northeast Ridge, the same synthetic colors that are meant to make a climber visible to a rescue team are also what mark the place where dozens of them never got up again.

No official map carries the name "Rainbow Valley." It is climbers' shorthand, passed down through expedition reports, guide briefings, and the accounts people bring home, for a section of terrain that every summit aspirant on the north side route eventually has to cross. This piece explains where the name comes from, what is actually there, and why a name that sounds almost pretty describes one of the most sobering stretches of ground on Earth.

What "Rainbow Valley" Actually Means

Everest's death zone begins at roughly 8,000 metres (26,247 feet), the altitude above which the human body cannot acclimatize and is slowly dying regardless of fitness or experience, a fact covered in detail in our guide to Everest's death zone. Rainbow Valley sits inside that zone, on the northeast ridge route that climbers take from the Tibetan side of the mountain. The name is descriptive rather than official: it refers to the visual effect of the terrain, not a feature with fixed boundaries on a topographic survey. Different expedition accounts place its edges slightly differently, which is normal for a nickname rather than a surveyed location, but they agree on the essentials: it is high, it is on the north side, and it is where a disproportionate number of Everest's fallen climbers remain.

Where Rainbow Valley Sits on Everest's North Side

The northeast ridge route climbs from advanced base camp on the Tibetan side, past the North Col, and up through a sequence of features climbers refer to as the First, Second, and Third Steps, rocky obstacles just below the summit ridge. Rainbow Valley lies in the terrain below and around this section, in the same general elevation band as the alcove where the body known as Green Boots rested for years, a case covered in full in our piece on Green Boots. Some general-audience articles place "Rainbow Valley" more loosely, using it almost as a synonym for the death zone as a whole. The more specific and more commonly repeated usage, and the one this article follows, ties it to this particular stretch of the north side route, not to the death zone in general and not to the South Col route on the Nepal side, where a separate set of well-known cases occurred.

Why the Colors Are Still There Decades Later

Modern high-altitude gear is built from synthetic insulation, ripstop nylon shells, and dyed technical fabric designed to survive extreme cold without degrading. Above 8,000 metres, the air is too cold and too dry to support the bacteria and insects that would normally break down organic material at lower elevations, so bodies and the gear on them are effectively freeze-preserved rather than decomposed. A red or orange down suit that was manufactured to stay visible in a whiteout for rescue purposes stays exactly that visible five, ten, or twenty years later. That is the entire mechanism behind the name: nothing fades, nothing decomposes at any meaningful rate, and the mountain does not return the color to neutral the way a temperate climate would. Oxygen cylinders, tent fragments, and abandoned rope are part of the same picture, discarded gear that never breaks down and simply accumulates season after season alongside the climbers who could not be brought down.

How is climate change making Rainbow Valley more visible?

June 2024 brought new, unwelcome evidence of how much the mountain is changing: a Nepali Army-led recovery team retrieved five bodies from Everest, Lhotse, and Nuptse, one of them reduced to skeletal remains, after chipping through ice with axes and, in places, pouring boiling water to loosen the grip of decades-old frost. Major Aditya Karki, who led the 12-person military and 18-person Sherpa team, told reporters plainly that "because of the effects of global warming, (the bodies and trash) are becoming more visible as the snow cover thins." That single sentence reframes Rainbow Valley's visibility problem: the colors are not simply staying put, they are being uncovered, as glacial ice that had buried remains for years or decades retreats under warmer average temperatures. More than 300 people have died on Everest since organized expeditions began in the 1920s, and the same thinning ice that exposes trash also exposes them, which is part of why recovery campaigns increasingly frame their work in climate terms rather than purely as a mountaineering housekeeping problem.

Why This One Stretch Holds So Many of the Mountain's Remains

Roughly 200 bodies are estimated to remain on Everest, a figure explored fully in our article on why bodies remain on Everest. A disproportionate share of that total is concentrated in the highest sections of both the north and south routes, the terrain between the last camps and the summit, because that is where climbers are most exhausted, most oxygen-starved, and furthest from help when things go wrong. Rainbow Valley sits inside exactly that band on the north side. Climbers who lose their footing near the ridge, or who collapse from exhaustion or hypoxia during the long descent from the summit, tend to end up in the terrain immediately below the ridge line rather than being swept further down the mountain, since the slope here is broken by rock outcrops and shallow gullies rather than being one continuous fall line. That terrain shape is a large part of why remains concentrate here rather than being scattered evenly across the whole upper mountain.

How does Rainbow Valley fit into Everest's death toll?

Roughly 340 people are believed to have died attempting Everest since organized climbing began in the 1920s, and the May 1996 storm alone killed eight climbers over two days, a disaster documented in depth in our death zone guide. Rainbow Valley is not a separate death toll from that total; it is one of the physical locations where a portion of it is visible. The distinction matters because Everest's fatality statistics are often reported without any sense of where on the mountain they actually happened. Rainbow Valley, the area around Green Boots' former resting place, and the zone near the South Summit on the Nepal side are the three locations that account for the highest concentration of visible remains, and all three sit inside the same roughly 8,000 metre and above death zone.

How Everest's Death Toll Clusters, and Where Rainbow Valley Fits

Four locations account for a disproportionate share of Everest's fatalities, according to data drawn from the Himalayan Database and mountaineering statistician Alan Arnette's annual "Everest by the Numbers" reporting: the Khumbu Icefall, the Lhotse Face, the South Col-to-Hillary Step stretch on the Nepal route, and the First and Second Steps on the north side route where Rainbow Valley sits, at roughly 8,600 metres. Roughly 60 percent of Everest deaths happen during descent rather than the climb up, consistent with what Rainbow Valley itself represents: exhausted, oxygen-depleted climbers who summited successfully but ran out of margin on the way back down. The same data sources place the modern death rate at roughly 1 percent of climbers per attempt, down sharply from around 5 percent in the 1980s, a reminder that better forecasting, fixed-rope logistics, and supplemental oxygen protocols have made the mountain safer even as decades of past attempts continue to define what remains visible today. Rainbow Valley, in other words, is not evidence that Everest is getting more dangerous. It is largely a visible record of risk from years the mountain was more dangerous than it is now.

Who are Rainbow Valley's best-known neighbours?

Two of Everest's most referenced death zone cases occurred along or near this same north side terrain. Green Boots, the name given to a body long used as an informal distance marker on the northeast ridge route, rested in a limestone alcove within the same elevation band as Rainbow Valley until it was moved from public view in 2014. Francys Arsentiev, whose story is told in our article on Sleeping Beauty, died in 1998 during her descent from the summit on this same northeast ridge route, high in the death zone. Neither case is formally described in expedition literature as having occurred "in Rainbow Valley" specifically, and this article does not claim otherwise, but both illustrate the same north side terrain and the same set of conditions, exhaustion, oxygen depletion, and a descent route with almost no margin for error, that produced Rainbow Valley in the first place.

What Passing Through It Involves

Above 8,000 metres, climbers are functioning with a fraction of the oxygen available at sea level even when using supplemental bottled oxygen, and impaired judgment, slowed reaction time, and occasional hallucination are documented and common effects of that altitude, not rare exceptions. Climbers who have written about their summit attempts on the north side describe passing fixed points along the route that have become informal landmarks precisely because they do not change from season to season, a grim kind of permanence that guides sometimes use to help members track their position on the ridge. Mental health researchers who study high-altitude mountaineering have noted that exposure to visible death during a climb can contribute to acute stress responses and, in some climbers, lasting psychological effects afterward. None of this is incidental to the climb. It is a documented part of what a north side summit attempt on Everest involves once a climber passes above 8,000 metres, and it is one of the reasons expedition operators brief clients on what to expect before they ever leave base camp.

Why Recovery Almost Never Happens Here

Body recovery from Everest's death zone is among the most expensive and dangerous operations in mountaineering, not a routine service that can be requested. A 2024 recovery mission on the mountain cost between 75,000 and 80,000 US dollars per body, with the full operation exceeding 600,000 dollars, and individual cases have run far higher depending on location and conditions. Helicopters cannot reliably operate above Camp II, at roughly 6,400 metres, because the air is too thin to generate the lift a helicopter needs, which means every recovery above that point has to be carried out on foot by climbers who are themselves exposed to death zone conditions. Bodies are frequently frozen directly into the ice and rock, and freeing one can take upward of 11 hours of manual work with an ice axe before it can even be moved onto a sled and dragged down fixed ropes. Wind above 30 knots halts recovery work entirely, since the same exposure that killed the original climber threatens the recovery team. A 2023 poll by the Himalayan Times found that roughly 60 percent of Sherpas opposed further recovery missions on safety grounds, a position with real historical weight: in 1984, two Nepali climbers died during a single attempt to recover one body. Rainbow Valley's remains stay where they are for the same reasons: recovery here is not simply expensive, it is a serious risk to the living for the sake of the dead.

What This Means If You're Trekking to Base Camp, Not Climbing to the Summit

Everest Base Camp on the Nepal side sits at 5,364 metres, roughly 2,600 metres below where the death zone begins and nowhere near the northeast ridge, the Second Step, or Rainbow Valley itself. Trekkers who follow the standard Everest Base Camp Trek route never approach the terrain described in this article, and the altitude-related risks that do apply to trekkers, primarily acute mountain sickness rather than the death zone physiology described above, are a different category of concern with well-established prevention strategies covered in our altitude sickness guide. Rainbow Valley is part of Everest's summit mountaineering history, not part of the trekking experience to its base, and understanding that distinction is useful for anyone trying to separate what happens on a trek from what happens 3,000 vertical metres higher, on a technical climb that only a small fraction of visitors to the region ever attempt.