Aconcagua and Ojos del Salado are close in height, but they are different expeditions. Aconcagua is the higher of the two at 6962 m, and it works as a big walking expedition through the Horcones valley and a system of high camps. Ojos del Salado is 6893 m, the highest active volcano in the world; the Chilean route crosses the high Atacama desert and depends on four-wheel drives, the state of the roads and a short rock step near the summit.
If you want a peak from the Seven Summits project, choose Aconcagua. If your goal is the Seven Volcanoes and the experience of high desert, choose Ojos. For a first near-seven-thousander, the decision does not rest on a difference of 69 m but on your previous nights at altitude, your skills, the days you have available and the style of expedition you prefer.
Each mountain’s place in these collecting projects is covered separately: Aconcagua in the Seven Summits project and Ojos del Salado in the Seven Volcanoes project.
| Criterion | Aconcagua | Ojos del Salado |
|---|---|---|
| Height | 6962 m | 6893 m |
| Country of the main programme | Argentina | Chile |
| Starting city | Mendoza | Copiapo |
| Main Mountain Guide format | 17 days | 15 days |
| Nature of the access | Walking approach to Plaza de Mulas | 4×4 drives across high desert |
| Acclimatisation logic | The approach plus two high-altitude cycles | A sequence of lagunas, day walks and San Francisco |
| Upper terrain | Scree, with possible snow and ice | Scree, possible snow and a short rock step |
| Main logistical variable | The stages, mules and high-altitude carries | Whether the roads are passable, 4×4 vehicles and fuel |
The main difference is not the height but the structure of the route
The gap between the two summits is only 69 m, and it says almost nothing about which mountain will prove harder for a particular person. On Aconcagua the strain accumulates over the long approach, the carries between camps and two forays into the high section. On Ojos, vehicles shorten the walking, but they can also deliver you into thin air very quickly. Acclimatisation cannot be accelerated by car.
Both programmes demand the ability to function at close to 7000 m, to live in tents, to keep eating and drinking when your appetite has gone, to protect yourself from wind and cold, and to accept the guide’s decision to turn back. The Normal route on Aconcagua is technically easier than the upper section of Ojos, but it is longer and harder in terms of carrying loads.
How acclimatisation works on Aconcagua
The main Aconcagua programme goes through Confluencia at 3300 m, a day walk to Plaza de Francia at 4200 m and Plaza de Mulas at 4350 m. Above base camp it uses Plaza Canada at 5000 m, Nido de Condores at 5600 m and Cólera at 6000 m.
The 17-day schedule includes a first cycle up to around 6000 m and a descent to Plaza de Mulas to recover. The team then climbs again through Nido and Cólera for the summit attempt. Two reserve days give more room for weather and for the state of the team, but they do not guarantee a summit.
The shorter 12-day and 7-day options work differently. The seven-day “Blitz” is only accepted after recent pre-acclimatisation no lower than 5000 m, preferably 5500 m or above. The comparison is in the article “Aconcagua in 7, 12 or 17 days”.
How acclimatisation works on Ojos del Salado
The standard Ojos programme starts in Copiapo and works through Laguna Santa Rosa at 3700 m, Laguna Verde at 4250 m, acclimatisation walks and an ascent of San Francisco up to 6018 m. The team then moves to the Atacama camp at roughly 5300 m and Tejos at roughly 5800 m.
San Francisco is not a sightseeing extra but a high-altitude objective in its own right ahead of the main climb. Vehicle logistics make it possible to change location faster, so the schedule has to impose an artificial limit on how quickly height is gained. Whether the road is passable is checked on the spot: snow and the state of the surface can change the drop-off point.
A short eight-day Ojos programme also exists, but it is only for participants who are already acclimatised. If you are flying in from sea level in the usual way, choose the full 15-day route.
Technical difficulty and equipment
On the Normal route on Aconcagua, typical conditions involve no obligatory difficult climbing and no snow-covered glacier. Snow and ice may call for crampons and an ice axe. The main difficulties are altitude, wind, cold, the length of the expedition and the need to carry your own equipment above base camp.
On Ojos, most of the route crosses volcanic scree and possible patches of snow. Below the summit there is a short rock step where, depending on conditions, the guide may set up protection. You need basic skills with crampons and a harness, and the ability to follow instructions on a rope.
Kit lists cannot be transferred from one mountain to the other without checking. Read the separate articles on equipment for Aconcagua and equipment for Ojos, then check the current page of the programme you choose.
Daily life and the everyday load
Aconcagua begins with a long walking approach. Mules carry the agreed baggage as far as Plaza de Mulas, but above base camp personal kit and part of the group equipment are carried by the participants or by porters booked separately. Plaza de Mulas has basic infrastructure; the high camps remain self-sufficient.
On Ojos, vehicles link the camps, but constant hotel comfort in the desert is not guaranteed. The team lives in tents, and Tejos is used depending on actual availability. Showers, internet, a mobile signal and constant charging are not features of the route by default. The remoteness makes a sound vehicle, fuel, water and a margin especially important.
Weather and reserve days
Both summits are exposed to strong wind, hard frost and snow. On Aconcagua the weather affects the moves between camps and the summit window. On Ojos it affects the summit and the state of the roads at the same time. A good forecast for the town says nothing about conditions at 6000 m.
The main programmes include two reserve days, but the reserve may go on a change of route, a closed road or recovery. These are not two guaranteed attempts. If conditions remain dangerous, the right decision is to go down.
Which mountain to choose first
| If what matters more to you is | The logical choice is | What to check |
|---|---|---|
| A classic big expedition and the Seven Summits | Aconcagua | Readiness for the approach, the loads and two high-altitude cycles |
| The highest volcano and the Atacama | Ojos del Salado | Crampon and rope skills, and coping with rapid changes of location |
| More time to build adaptation | The 17-day Aconcagua | Experience above 5000 m and of living in tents |
| Vehicle support between camps | Ojos del Salado | Not confusing transport with acclimatisation |
| The fewest technical elements | The Normal route on Aconcagua | Snow can still call for crampons and an ice axe |
| Both objectives in one trip | The combined programme | Your reserves of fitness, your recovery and the shared logistics |
For a first trip to around 7000 m, people more often choose the full programme rather than a short product. If you have never slept high, you cannot treat Ojos as a “near-seven-thousander made easy” just because there are vehicles. And if you have no experience of tented expeditions and carries, you cannot underestimate Aconcagua just because of its Normal route.
Cost and what is included
Comparing the tour price alone is a mistake. A full budget includes international and domestic flights, the permit, insurance, personal equipment, any hire, porters, single occupancy and the costs of changes to the schedule. What is included varies by product.
For Aconcagua, the current programmes list the permit separately at 1285 dollars. For Ojos, you cannot carry a figure for the permit across from someone else’s tour without confirming it. Costs are broken down in detail in the articles on the cost of Aconcagua and on the cost of Ojos.
Can you climb both summits
Yes. The combined Aconcagua and Ojos del Salado programme runs to 22 days and uses the acclimatisation from the Argentine section before a quick move to the Chilean one. It is not two independent short programmes glued together with flights, but a single altitude scheme.
After Aconcagua, sleep, appetite, injuries, loss of strength and overall recovery are all assessed. A successful first summit does not oblige the team to carry on. Illness or exhaustion can rule out Ojos even when the acclimatisation is still there.
The decision in four typical situations
After Elbrus, you want a first summit of around 7000 m
Elbrus gives useful experience of 5642 m, of cold, crampons and early starts. But it does not reproduce the multi-day altitude living of either of these expeditions. If you are more drawn to a classic sequence of camps and the Seven Summits project, the natural next step is the 17-day Aconcagua. If the Atacama appeals and you have basic rope skills, the full Ojos is worth considering. In both cases your Elbrus experience is judged by the route, the nights out and how you felt, not by the summit alone.
You have experience in Bolivia or Ecuador
Several ascents and nights above 4500-5000 m tell you far more about how you handle altitude. That can make both objectives realistic. Recent acclimatisation and general experience are not the same thing, though: a short programme needs a small gap between trips, while the standard one needs a demonstrated ability to string consecutive high days together. The choice comes back once again to the style of the route and the time you have.
You would rather not carry a rucksack between camps
Vehicle support on Ojos reduces the amount of walking with loads, but it does not remove the physical work or the altitude. Getting through depends on the road, and you walk to the summit under your own steam. On Aconcagua you can book high-altitude porters, but that is a separate service and it does not eliminate the long stages. If carrying loads is a medical or a non-negotiable limitation, discuss it before booking rather than choosing a mountain from a general description.
You want to tick off both summits in one trip
Then it is better to take the ready-made 22-day combination rather than joining two short programmes together yourself. It keeps the flights, the altitude and the reserves within a single logic. Accept in advance, though, that you may finish after the first mountain: the acclimatisation may hold, but your overall reserves may not.
The five phases of the two expeditions
It is more useful to compare not just the summits but the sequence of work. Both programmes lead to almost 7000 m, but fatigue builds up differently. On Aconcagua you enter the route gradually on foot and then move camp above base. On Ojos, the first high camps and the big day on San Francisco are combined with drives across the Atacama.
| Phase | Aconcagua | Ojos del Salado | What to check in yourself |
|---|---|---|---|
| The start | Mendoza, park entry and the walk in | Copiapo and driving out into the desert by 4×4 | How you cope with long walking or with rapid changes of altitude |
| First adaptation | Confluencia and Plaza de Mulas | Santa Rosa and Laguna Verde | Sleep, appetite and pace on the first nights out |
| The big test | The high-altitude cycle above base camp | San Francisco at 6018 m | Recovery after a hard day on your own resources |
| The upper section | Carries between the high camps | Atacama, Tejos and dependence on the road | Working with a rucksack, or the operational uncertainty of a 4×4 |
| The attempt | A long non-technical day at altitude on the Normal route | Scree, possible snow and a short rock step near the top | Technical skills, cold, pace and reserves for the descent |
The table does not name a winner. Someone with strong endurance but no crampon skills may find the Normal route on Aconcagua more straightforward. Someone who copes badly with repeatedly moving camp may subjectively prefer Ojos, though the fast drives and the rock finish create demands of their own.
Compare specific programmes, not names
The same mountain name does not guarantee the same product. Before choosing, break the offers down by nights out, acclimatisation walks, reserve, number of guides, group equipment, catering, transport and the costs if the plan changes.
- On Aconcagua, check the approach, the two high-altitude cycles, the load carries and the services above Plaza de Mulas
- On Ojos, check the Santa Rosa – Laguna Verde – San Francisco – Atacama – Tejos sequence
- For both mountains, separate the programme price from the permit, insurance, flights and personal equipment
- Establish who leads the ascent and what guide ratio applies on the main attempt
- Pin down what the reserve is for and the costs of an early descent or an extra night
The “Aconcagua or Ojos” question only makes sense once these terms are aligned. Otherwise you are comparing not mountains but packages that happen to differ.
How to sequence two objectives
If both summits belong to one project, the order has to take acclimatisation and recovery into account. The Aconcagua and Ojos combination uses the long Argentine expedition as the altitude foundation for the Chilean part. The move to Ojos is confirmed after Aconcagua, though, not simply at the point of purchase: illness, injuries, sleep, eating and the state of your feet and equipment are all checked.
The reverse order should not be assumed automatically. The actual calendar, the transfers, the permits and the support team come from the published programme or from a separate quotation. You cannot swap the mountains around on the basis of one article and assume the services and reserve stay the same.
If you only have one trip available, choose the objective by project and by profile. For the Seven Summits, the canonical objective is Aconcagua. For the Seven Volcanoes, it is Ojos del Salado. When the collecting project is not the main point, the deciding factors are the character of the route, your willingness to carry loads, your technical experience and the time you have.
Take recovery into account, not just the altitude reached
Previous high-altitude experience helps you choose a first mountain only if you know what it cost your body. Two identical summits can leave very different profiles: one person ate and slept well, moved steadily for several days and recovered quickly; another got there with marked symptoms, lost their strength and needed a long rest. In a list of ascents these look the same; in planning they do not.
| Data from the previous trip | What it helps you understand |
|---|---|
| Sleeping altitudes | How you tolerate sleep and repeated effort |
| The number of hard days in a row | Your ability to work without full recovery |
| Symptoms and the decisions taken | Recurring risks and your willingness to report them |
| The reason for turning back | Whether the problem was weather, pace, preparation or health |
| Your condition after the descent | The real reserves you have before the next big objective |
If the previous expedition ended in illness, injury or exhaustion, the more comfortable logistics of Ojos are not a cure for the problem. Equally, being strong on a trek does not prove you can handle rapid changes of altitude by vehicle. Base the choice on the facts of your recent trips and your current preparation.
For the two-mountain combination, recovery is checked between the expeditions. Even a transfer already paid for does not remove the need for a fresh assessment. The right outcome may well be to give up the second summit if you used up your reserves on the first. The decision is taken before setting off for the next remote section, while you can still change your personal plan safely and agree the consequences with the operator. This conclusion is always recorded separately for the whole team.
Differences in managing risk
On Aconcagua the team moves camp on foot. A mistake in distributing loads, too fast a pace or insufficient recovery shows up over consecutive stages. On Ojos the operational decision is more closely tied to the road: the drop-off point available, the fuel margin and the ability to get back can change the plan before the walking even begins.
Insurance for both mountains has to cover mountaineering, the appropriate altitude, search and rescue and evacuation. But how help actually reaches you differs. On Ojos a vehicle is not a guaranteed ambulance, and on Aconcagua the presence of park infrastructure does not mean free evacuation. Check the policy and the communication procedure separately against the articles on insurance on Aconcagua and insurance on Ojos.
Do not choose a mountain on the assumption that you can “get down quickly”. At high altitude a deterioration can develop faster than transport can be arranged. The foundations remain gradual acclimatisation, reporting symptoms early and a timely decision by the guide.
Frequently asked questions
Which mountain is physically harder?
Aconcagua generally involves more walking and more carrying; Ojos has less of an approach but links its high points more abruptly and adds desert remoteness. The individual answer depends on how well you carry loads, sleep high and function in the cold.
Which mountain is technically harder?
Ojos has a short rock section where protection may be needed. The Normal route on Aconcagua does not involve anything of the kind in ordinary conditions. Snow and ice change both mountains, though, and technical simplicity does not reduce the physiological difficulty.
Where are the summit chances better?
There is no meaningful universal percentage. The outcome depends on the programme chosen, acclimatisation, weather, the state of the roads, pace and the team’s decisions. Marketing statistics that say nothing about the participants or the routes should not drive your choice.
Can I choose Ojos because it takes fewer days?
The standard Ojos programme runs to 15 days, Aconcagua to 17. A two-day difference does not make the first objective a short one. The eight-day Ojos and the seven-day Aconcagua are only for participants who are acclimatised beforehand.
Which is better for the Seven Summits project?
Aconcagua is the continental summit of South America and part of the classic programme. Ojos del Salado belongs to the Seven Volcanoes project. If you are planning both projects, the order can be built around your experience and your calendar.
Which has the more comfortable base camp?
Plaza de Mulas on Aconcagua has better-developed seasonal infrastructure, but the specific facilities depend on the package. On Ojos the camps are spread along a desert road, and Tejos is used according to availability. In both cases a tent, meals, showers, communications, charging and bedding count as included only when the programme says so explicitly.
Do I need to climb Aconcagua first?
There is no obligatory order. Aconcagua can give you the experience of a big high-altitude expedition before Ojos, and Ojos can give you the experience of almost seven thousand metres and of a rock section before Aconcagua. Choose the order according to the dates available, your recent experience and the specific programme, not according to a difficulty ranking.
What to send us for a recommendation
- your previous summits and the dates of those trips
- your maximum daytime altitude and your sleeping altitudes
- symptoms and the quality of your recovery
- experience with tents, crampons, ice axe and harness
- your willingness to carry your own loads
- the dates available and any margin after the programme
- whether you are interested in the Seven Summits, the Seven Volcanoes or both
After that, compare all the Aconcagua programmes and all the Ojos del Salado programmes. The choice should follow from your experience and the route, not from a marketing label calling something “the easiest”.
Facts checked: 17 August 2026. Services, prices, the state of the route and external rules are checked for the dates of the programme you choose.