San Francisco, 6018 m, is included in the 15-day Ojos del Salado programme as a major acclimatisation ascent. Its purpose is not to add a second summit for the sake of a good-looking list, but to test how the body and the team work before the move up to the Atacama and Tejos camps.
The part San Francisco plays in acclimatisation
Where San Francisco sits in the programme
After nights at Laguna Santa Rosa and Laguna Verde, the group climbs San Francisco and then returns to Laguna Verde. Under the current programme part of the approach can be driven in a four-wheel drive, with the rest of the ascent done on foot.
The actual starting point and the timings depend on the state of the road, the weather and the pace of the group. These figures should not be turned into a guaranteed standard in advance.
Why an ascent above 6000 m is useful
- It gives the body an altitude stimulus before the higher camps.
- It shows how each individual reacts at around 6000 m.
- It lets you test clothing, footwear, food and pace.
- It gives the guide more information about how ready each climber is.
- The descent afterwards is built in, for sleep and recovery.
Why San Francisco cannot be called a warm-up
A six-thousand-metre peak is a serious altitude undertaking in its own right. You can get tired, get cold or develop symptoms. Trying to move faster to save time makes acclimatisation worse and raises the risk of injury on the descent.
What the team is checking
What is assessed during the ascent
| Parameter | What is assessed |
|---|---|
| Pace | The ability to move steadily without repeated surges |
| How you feel | How symptoms develop as you gain height |
| Clothing | Warm hands, feet and torso both moving and at halts |
| Food and drink | The ability to eat and drink regularly |
| Recovery | Sleep, appetite and condition after the descent |
What to do after the ascent
Getting down does not mean the day is over. You need to change into dry clothes, eat, rehydrate, check your feet and tell the guide about any symptoms. The next day of the programme is set aside for rest and acclimatisation, so it should not be turned into extra training without the team’s agreement.
If the summit of San Francisco is not reached
Turning back does not in itself mean the expedition is over, but the reason matters a great deal. Weather, the road, pace and how you feel are all judged separately. The decision to move higher belongs to the guide, not to the calendar.
Equipment and preparation
Equipment
You need layered clothing, protection from wind and sun, suitable footwear, poles, a supply of water, food and a headlamp. Crampons and other technical equipment are taken according to the current list and the conditions on the day.
How to prepare
Useful training includes long ascents followed by descents, work with poles and paying attention to nutrition. There is no point rehearsing altitude with a hypoxic mask: it does not produce genuine acclimatisation.
For the context of the whole route, see the overview of Ojos del Salado. It is also worth reading about preparation, acclimatisation and the exact schedule of the 15-day expedition.
How to read the result
Why San Francisco is not a formality
An ascent to 6018 m lets the team test itself above the height at which it will later sleep at Atacama and Tejos. It shows how pace, eating and drinking, coordination and the ability to follow instructions hold up after several hours at altitude. Reaching the summit matters less than the quality of the movement and the recovery after coming back down.
What is analysed afterwards
| Indicator | A useful question |
|---|---|
| Pace | Was it possible to move evenly, without an early surge? |
| Food and drink | Was it possible to eat and drink regularly? |
| Cold | Did the system of layers and gloves work? |
| Technique | Were balance and concentration maintained? |
| Symptoms | How did they change going up and after the descent? |
| Recovery | Had sleep and appetite returned by the next morning? |
If someone is sharply drained after San Francisco, sleeps badly or is getting worse, the logical answer may be extra rest, a change to the plan or stopping the gain in altitude. A summit reached is not automatic permission to go higher.
How to prepare for this day
- Have recent experience of long ascents and descents.
- Be able to hold a slow pace without constantly speeding up.
- Check your boots, socks, poles and layering system.
- Prepare food that is easy to eat on the move.
- Do not treat the day as a competition within the group.
San Francisco is an altitude objective in its own right and an important part of the Mountain Guide acclimatisation profile. It does not guarantee Ojos, but it gives the leader and the climber far more information than a short drive up to the next camp.
San Francisco as a test, not a clearance
A successful ascent of San Francisco does not issue automatic clearance for Ojos. It provides the information on which a decision is made. The leader looks not only at the highest point reached but at how the climber got there, whether coordination was maintained, whether they could drink and eat, how quickly they descended and what happened to their symptoms that evening.
Two people who reach the same altitude may be given different advice. One came back to camp with something in reserve, ate and slept normally. The other arrived at their limit, stopped drinking and did not recover after the descent. For the rest of the route it is the whole picture that counts, not a photograph on the summit.
Which signals must not be concealed
- A headache that keeps getting worse
- Nausea, or refusing food and water
- Unusual drowsiness and sluggishness
- Loss of coordination
- Breathlessness that does not ease at a halt
- A sharp drop in pace compared with previous days
Reporting symptoms is not an admission of weakness. It makes it possible to stop the ascent in time, get down and keep the options open. Hiding a deterioration in order to stay on the programme deprives the guide of the information on which a safe decision is built.
Why the night afterwards matters
The acclimatisation effect is not judged at the moment you touch the summit. After the descent, what counts is appetite, the quality of sleep, headache, resting pulse and overall recovery. That is exactly why the programme brings the group back down and leaves time before the move to Atacama.
If someone is recovering poorly, that cannot be made up for by driving higher quickly. A vehicle shortens the distance, but it does not lower the altitude of the camp. The plan from there has to take account of how people are in the morning, not only of a day-by-day table printed in advance.
How to use the San Francisco experience on Ojos
After the ascent you adjust your clothing system, the amount of water, your food and the order in which you pack. If your hands were cold, change the combination of gloves. If the food stayed in your pack, choose a format that is easier to get at. If the start was too fast, agree a calm pace for summit day in advance.
San Francisco thus becomes a rehearsal of processes, but not a copy of Ojos. Summit day on the main mountain is higher, longer and comes after further exertion. The useful conclusion is not «I have already done a six-thousander» but a specific list of what worked and what needs fixing.
Questions to ask before choosing a programme
- Whether San Francisco is in the actual schedule
- Where the group descends to afterwards
- Whether time is allowed for recovery
- Who decides about moving higher
- How the programme changes in bad weather or if symptoms appear
- Which personal skills need to be learned beforehand
The answers help you tell a genuine acclimatisation stage from a second summit mentioned for the sake of the advertising. In the Mountain Guide programme San Francisco is treated precisely as part of the preparation for Ojos del Salado.
Before departure there is one more limit to understand: not reaching the summit of San Francisco does not entitle anyone to rearrange the order of the days on their own or to try to make up the height with an extra outing. Any adjustment is made by the leader, on the basis of the weather, the state of the roads and the response of the whole team. The main aim of this stage is to keep the route to the next part of the expedition safe.
The four phases of a day on San Francisco
| Phase | What is being tested |
|---|---|
| The drive in | The road as it actually is, packing, and the switch to walking |
| The ascent | Steady pace, clothing, food and symptoms |
| The high point | Weather, reserves and readiness to descend immediately |
| The return | Coordination, fatigue and recovery at Laguna Verde |
A vehicle shortens part of the approach, but it does not automatically make the altitude you walk at safe. The starting point is determined by the conditions on the day.
The drive in and the altitude load
Three figures are recorded separately: how far the vehicle got, how high the climber went and where they slept. A good road is not acclimatisation, and a short walking distance at great height can still be hard work.
After the ascent, condition is judged against the preceding nights. Simply comparing the kilometres with an ordinary training walk is misleading.
Why the summit is not compulsory at any price
The value of this stage lies in gathering information and getting safely back down. If the weather, the pace or someone’s condition calls for turning round, trying to deliver the advertised «second summit» destroys the main purpose.
The reason for turning back is recorded precisely. A decision taken because of the road or the wind is different from a deterioration in health, and the two affect the rest of the plan differently.
Clothing and equipment as a rehearsal of processes
On San Francisco you test the layering system, gloves, goggles, poles, boots, headlamp, water and food. Technical items are used according to the current list and the actual conditions.
After returning, note what you could not reach in your pack, where your hands got cold, what you failed to eat and how long packing took. The corrections are made before the move to Atacama.
The descent matters as much as the ascent
It is on the descent that tired legs, rubbing, loss of concentration and lack of food show themselves. Keep your spacing, follow the guide’s pace and do not head off to the vehicle on your own.
Getting back quickly by vehicle does not remove the need for observation that evening. A day at altitude is judged after food, rest and the following night’s sleep.
The decision matrix after the ascent
| Observation | What the leader discusses |
|---|---|
| Steady pace and good recovery | Continuing with the planned sequence |
| Turning back because of weather while in good shape | Planning, with no automatic negative judgement of the climber |
| Marked exhaustion after the summit | Extra rest or a change to the next stage |
| Symptoms that keep increasing | Stopping the ascent and descending safely |
| A problem with boots or clothing | Putting the kit right before going higher |
The table shows the logic; it does not replace a medical or a route decision.
The night after San Francisco
A useful outcome is confirmed by recovery: the climber can eat, drink, sleep and go about ordinary tasks. One photograph at 6018 m does not show that part.
In the morning the guide needs the information before anyone takes a remedy at random that might mask how things are developing. Personal medication is taken according to a plan agreed with a doctor.
Common mistakes at this stage
- Starting too fast after being driven in
- Assuming San Francisco is easy because it is not technical
- Not eating or drinking in order to save time
- Hiding symptoms so as not to lose the main summit
- Judging the day solely by having stood at 6018 m
- Using the rest day for extra training of your own
Every one of those mistakes reduces the quality of the information for which the summit was put into the programme in the first place.
Questions for the evening debrief
- What pace was it possible to hold?
- Where did problems with clothing or footwear arise?
- Was it possible to eat and drink regularly?
- Which symptoms appeared and how did they change after the descent?
- How independently did the climber pack up and recover?
- What needs correcting before Atacama?
The answers are recorded specifically. «It was all hard, but all right» does not help to adjust the next phase.
San Francisco does not replace a contingency day
A successful ascent does not create extra slack in the calendar. If the road, the weather or people’s recovery need time, the programme uses whatever options the actual situation allows.
The later nights must not be brought forward simply because the acclimatisation summit was reached on schedule.
San Francisco and the short Ojos programme
In the standard format the peak is built into an acclimatisation profile of its own. On the short programme the climber arrives with recent confirmed altitude of at least 5000 m, and the admission criteria are set separately.
You cannot simply delete the early days of the standard programme and treat the San Francisco ascent that remains as sufficient for anyone. The nights, the timings and the recovery all matter.
What to record in your altitude summary
- The date and the actual starting point
- The maximum altitude
- Sleeping altitude before and after the ascent
- Pace, and the reason for turning back if you did
- Symptoms and how they developed
- Your condition in the evening and in the morning
A record like that helps you assess the experience for future programmes, without turning a summit into a formal certificate of admission.
What this stage ultimately means
San Francisco should leave the team better informed, not merely more tired. Afterwards it is clear how a person responds to 6000 m, whether their equipment works and what has to change before Tejos and Ojos.
If the information is enough to stop gaining height, that too is a useful and professional outcome.
Looking for a route with a proper San Francisco stage? Check where it sits, what the descent afterwards is and how much recovery time is allowed in the standard Ojos del Salado programme.
Fact-checked: 17 August 2026. San Francisco is a stage that tests you, not automatic clearance for Ojos.