We're going higher
A new world record attempt at the highest marathon on Earth
Following the record-breaking expedition in Chile in 2026, BecomingX will return in May 2027 with a new attempt at the world’s highest marathon.
Thirty runners will travel to the Bolivian Altiplano to run a full marathon entirely above 4,400 metres — raising the lowest point of the course and setting a new world record for the highest marathon ever run. This 13-day adventure combines extraordinary landscapes, from La Paz and Lake Titicaca to the Uyuni Salt Flats, with a structured acclimatisation programme.
With only 30 places available worldwide, this is not just another endurance event — it is a rare opportunity to be part of a world-record attempt in one of the most extraordinary environments on Earth.
Taking part requires commitment, resilience, and a willingness to step far beyond the familiar. In return, you will gain access to a fully supported expedition, world-class expert guidance at extreme altitude, and the chance to share an experience that very few people in the world will ever encounter.
If you are ready to challenge yourself at the highest level — physically and mentally — and to be part of a small group attempting something genuinely historic, we invite you to register your interest and begin the journey.
Frequently asked questions
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We are currently planning several adventures! Fill out the contact form if you are interested in joining a BecomingX trip in the future.
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Yes! We have a number of corporate sponsorship opportunities available for upcoming events. Please contact whm@becomingx.com for a chat.
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Please get in touch with us at press@becomingx.com where we can provide you with press releases, imagery and can discuss potential interviews and quotes.
“This was one of the most extraordinary challenges I’ve ever taken on - not just physically, but mentally and emotionally. To be part of a team that pushed the limits at extreme altitude and set a new world record was something truly special. It’s an experience I’ll carry with me for the rest of my life.”
Aldo Kane