Cerro Incahuasi Ascent [5,305 m]: An Acclimatization Five-Thousander on the Road to Jama

The Cerro Incahuasi ascent (5,305 m.a.s.l.) is a one-day high-mountain hike from San Pedro de Atacama, along Route 27-CH towards Paso de Jama, at around kilometer 70. The climb takes 3 to 4 hours, has no technical or exposed sections, and the descent is fast on sand and sulfur paths. We use it as an acclimatization summit before higher mountains such as Cerro Toco (5,604 m) or Licancabur Volcano (5,916 m).

There are many Incahuasis in the Andes. This one is the five-thousander next to Cerro Peña Negra, not the 6,638 m Incahuasi Volcano climbed from Copiapó, nor Incahuasi Island in the Uyuni Salt Flat.

Cerro Incahuasi Technical Sheet

Field note from our guide: "The good thing about these mountains is that they have no technical or dangerous trails. They are perfect for acclimatization trekking with good scenery."

Getting There: Route 27-CH Towards Jama

We leave San Pedro de Atacama on Route 27-CH, the paved road that climbs to Paso de Jama. Near kilometer 70 we leave the asphalt and take a track that runs along the slopes of Incahuasi and Peña Negra. In some sections that track reaches 5,000 meters, so most of the altitude is gained in the truck.

Incahuasi also has old roads that climb towards the summit. Not all of them can be driven today, so the last stretch is done on foot.

Before adding this outing to your plan, check how many meters per day you are gaining with the acclimatization calculator. From San Pedro (2,400 m) to the summit there is a difference of almost 3,000 meters in a single morning.

The Ascent Route

Climb (3 to 4 hours)

From the point where we leave the vehicle we walk up open slopes of reddish loose rock. There are no scrambling sections or exposed ridges: it is uphill walking at a pace that lets you breathe well. We allow 3 to 4 hours to the summit, depending on how each person responds to the altitude.

Summit (5,305 m.a.s.l.)

The summit is a broad stony hilltop with a cairn and a wooden sign reading "Co. Incahuasi 5.305 m". From the top you see the plains of the altiplano and mountains with snow patches on their slopes.

Descent

The way down is very fast. There are sand and sulfur paths where you can dig in your heels and slide, with far less impact on the knees than on loose rock.

Incahuasi or Peña Negra: Which One to Choose

Both mountains share the same access track and neither has technical difficulty. The difference is how much you walk.

Peña Negra has one of the best views in the area towards Pili volcano, the Salar de Tara and Licancabur. Incahuasi demands more hours of walking, which makes it a better rehearsal before a volcano of nearly 6,000 meters.

If you have just arrived in San Pedro, we recommend starting with a lower outing such as Cerro Machuca (4,650 m).

Required Equipment

Details on materials are in our mountain gear guide.

• Three layers: thermal base layer, fleece or down jacket, and a waterproof windbreaker.
• Mountain boots with high ankle support and good traction on scree.
• Category 3 or 4 sunglasses. Above 5,000 m, UV radiation burns unprotected eyes.
• Trekking poles, most useful on the sandy descent.
• Gloves, hat and neck gaiter for the wind on the summit.
• 2.5 to 3 liters of water per person, sunscreen and lip balm with SPF.

Safety and Services Included with Vulcano

• ✅ High-mountain guides with WFR / WAFA certification.
• ✅ 4x4 transport from your lodging in San Pedro de Atacama.
• ✅ Oximetry and pulse checks during the ascent.
• ✅ Emergency equipment: backup medical oxygen in the vehicle, Garmin InReach satellite communicator and VHF radio.
• ❌ Not included: personal technical clothing, tips, or travel and rescue insurance.

Frequently Asked Questions

Is this the same Incahuasi as the 6,638-meter one?
No. The 6,638 m Incahuasi Volcano is on the border with Argentina and is climbed from Copiapó on a multi-day expedition. This Cerro Incahuasi is 5,305 m high, lies on the road to Paso de Jama and is climbed in a day from San Pedro de Atacama.

Do I need technical experience to climb it?
No. It is a hike with no climbing moves or dangerous sections. What you do need is to be acclimatized: the summit is 2,900 meters higher than San Pedro.

How long does the Cerro Incahuasi ascent take?
Between 3 and 4 hours up. The descent is much shorter because it follows sand and sulfur paths.

Can it be climbed in summer?
Yes, but between December and March the Altiplanic Winter brings thunderstorms and hail in the afternoons. In those months we leave early to be back at the vehicle before the sky closes in.