Travel companion for a mountain-bike crossing of the Atacama (Chile, Bolivia, Argentina) in October 2025
FR

Translated into English.

Original post
OL
I’m planning a journey of about 2500 km starting from San Pedro de Atacama (duration: max. 2 months). This trip, almost entirely on remote trails, promises to be an extraordinary adventure.

Highlights of the trip - Crossing the Florido Desert (during the blooming season: October 15–30) - Hiking ascents of legendary volcanoes: - Ojos del Salado (6879 m) - Llullaillaco (6739 m) - Uturuncu (6008 m, with 5820 m reachable by mountain bike!) - A 300 km stage through the heart of the desert, with no resupply or habitation: the ultimate experience of solitude and self-transcendence.

Practical details - Daily distance: max. 100 km and 1000 m elevation gain per day - Average altitude: 4000 m (between 3500 and 5000 m) - Temperatures: ~15 °C during the day, down to -25 °C at night (in a tent) - Accommodation: ~50% in villages (with locals or small hostels), ~50% camping

Estimated budget - 1400 € for the flight ticket (including bike supplement) - 1000 € for on-the-ground expenses

Required equipment - Fatbike (essential for deep sand) - -25 °C comfort sleeping bag - Single-wheel trailer (indispensable for these tough terrains)

My experience In 2022, I completed a similar 1200 km trip north of San Pedro de Atacama: - Full crossing of the Salar de Uyuni (170 km) - Ascents of the Ollague (5868 m) and Aucanquilcha (6176 m) volcanoes - Two 200 km stages with no resupply or human presence Videos available for a glimpse of the adventure: - Atacama Crossing 2022 - Part 1 - Atacama Crossing 2022 - Part 2

Next steps If this adventure interests you, I suggest: 1. A first phone call to get to know each other 2. A meet-up over a drink or a test ride in the Bardenas Reales (similar terrain, and I live 100 km away)

Don’t hesitate to contact me for more info or to discuss the details!
LU Lucbertrand Globetrotter ·
Hi Olized, your project is HUGE. I won’t be able to join you. I’ve had three cycling experiences in the Atacama Desert. The first was during a South America crossing from Lake Titicaca to Uyuni through the Atacama. The second was a full desert crossing from Arica to Santiago, Chile, and the third was a project between Argentina and Chile with three planned summits: Tuzle, San Francisco, and Socompa. The first went really well—almost no wind. We left our bikes around 4,500 m and camped near 5,000 m. The second, San Francisco, was brutal: we were pinned down by extreme winds and freezing temperatures even at midday. We stopped at the pass, and the cold started getting to us even inside the rescue hut. Around 3 PM, we turned back and descended 800 m to sleep at the Argentine border post at 4,000 m. For Socompa, we still had 500 km due west to cover with relentless winds—only brief calm periods at night. So, we headed for less windy areas in Argentina, avoiding high-altitude regions.

Given my experience, I understand how massive your project is. I read a trip report years ago about a couple who completed a similar bike journey, tackling around ten of the highest summits—it was incredibly impressive.

Are you sure fat bike tires will actually help? I’ve never used them, but the main sections where I had to push were mostly against the wind. Sometimes, even without wind, I pushed through sand, but out of several thousand km (4,000–5,000), it was less than a hundred km. On decent tracks or even pavement for connecting stretches, regular tires like Schwalbe work just fine.

Anyway, BRAVO for your boldness!
OL Olized ·
Thanks Luc for your reply, really interesting. If you still have the link to that couple’s trip, I’d love to see it.

About my first trip, during the prep and based on aerial photos, I was wary of some areas that looked potentially too sandy for 2" tires.... I went there with 2" tires anyway... and well... I was right! I ended up losing 2 days pushing the bike, whereas with a fatbike it would’ve been a breeze.

On one of the 200 km stages with nothing around, I had to push for 10 km and struggled for another 10 km because of the sand, never knowing when it would end.... a bit nerve-wracking, honestly.

Then, with the heavy load (up to 20 L of water) in the trailer, we never went faster than 15 km/h on flat ground, so at that speed, whether it’s a fatbike or thin tires, it makes almost no difference.

For the trip I’m proposing now, the whole section between Tolar Grande and Ojos de Salado is 450 km with just one village in the middle! And from the photos I’ve seen, some parts don’t inspire confidence about the condition of the tracks! Then the last 1000 m of elevation gain to Ojos is a loose track at a 15% grade.

So a fatbike seems like a must, both for peace of mind (it’s too frustrating to have to push or worse, give up) and for safety! !
LU Lucbertrand Globetrotter ·
Your fatbike plan makes total sense. Anything over 4,500 m with a 15% grade is brutal. I’m thinking of the stretch after Laguna Colorada toward the geysers—700 m of elevation gain or something like that. Even though the track was good, I had to push.

True, the drone really helps spot and steer clear of soft patches. We got completely bogged down in the Salar de Coipasa—salt and sand up to the hubs.

I’ll try to dig up the trip report. I can’t remember if it was in English or French. When I was researching for my different trips, I’d do it in French, English, German, and Spanish.

I’ve noticed that around there, the best window is October–November. And when I was near San Francisco, not far from the Salado de Ojos, a local guide told me the best time to climb those 6,000 m peaks is February, when the wind’s less fierce.

Your project is seriously inspiring. Where will you start from? Mendoza seems like a solid launch point. Last time, that’s where I set off from.
OL Olized ·
I think I see that famous climb before the geysers you mentioned!

Otherwise, I plan to start from San Pedro de Atacama (so Calama airport). I didn’t mention it, but I’d like to hike up Licancabur, which is nearby. Riding between Sairecabur and Licancabur by bike—there’s an incredible, lost cirque there. Then Uturuncu, which is north of San Pedro in Bolivia.

Basically, this trip would be a "small" loop north of San Pedro and a big one to the south (Ojos del Salado, Tolar Grande...).

In short, it’s really the arid part of the Atacama that attracts me the most.
LU Lucbertrand Globetrotter ·
Hi! I haven’t found the link yet to that couple who cycled through the Atacama and climbed numerous volcanoes, but I did come across this book: https://www.fnac.com/a17117410/Patrick-Espel-A-6-000-metres-sur-une-autre-planete

When you’re at Llullaillaco, you’ll be in an incredible place—those famous mummies discovered at the summit in 1999, now at the alta montaña museum in Salta. A fifteen-year-old girl and two children, a boy and a girl. The "Niña del Rayo" (Lightning Girl), because she was struck by lightning at the summit, and her clothes are partly burned. Their burial at the top dates back to around the 16th century, just before the Spanish arrived. Their bodies were so well preserved because the ground temperature never rises above -13°C. This museum in Salta is truly impressive. I’m not usually a big museum fan, but I visited it twice—once before leaving and again two and a half months later, on my way back from my last trip to the Atacama. The commentary is in English and Spanish, absolutely fascinating.
OL Olized ·
The book is ordered—thanks for your research!

Heading up to *alta montaña* could be an idea, but planning my whole itinerary around just 2 months is already going to be intense.

First, a week of acclimatization in San Pedro doing short mountain-bike rides and some "tourism" before I even start.

When I climbed the Ollagüe volcano and especially the Aucanquilcha, there were remnants of old sulfur mines. All that was left were the steel structures, but they really showed the scale of the living quarters back then. Impressive! It was just before the summit (200 m below, maybe?)
OL Olized ·
Just bumping my post!

And so, I’ve updated the dates to mid-March through mid-May.

40 days on the road (if everything goes as planned) over a 60-day window. So if anyone’s interested... with the option, of course, to extend or tweak my original route.

Just a few must-dos for me: Llullaillaco Licancabur Ojos del Salado Uturuncu
LU Lucbertrand Globetrotter ·
Hi Olivier, have you done your trip with the ascent of the various 6000 m peaks?
OL Olized ·
Hello, no, I’ve postponed it to mid-March 2026....
HE Herge Veteran ·
Hi, Keep us posted on your departure! If you need any tips or help while you're there, just let me know—I live in Buenos Aires.

petitherge.com
Tout sur l Argentine, et completé 24h/24h depuis le 29 oct 2005 http://www.petitherge.com/

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