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Advnture
Advnture
Julia Clarke

Is it the Ultrafly 2? An ultra runner, a new record and a mysterious Nike prototype trail shoe – Hoka and Salomon might want to take notice

Caleb Olson high fiving spectators after winning the Transgrancanaria 2025.

An unreleased prototype pair of Nike trail running shoes that made the podium at Transgrancanaria last week have set tongues wagging, with many wondering if Nike is planning a serious move into trail running territory.

On February 22, Utah's Caleb Olson crossed the finish line in Maspalomas in a stunning 12 hours, 17 minutes and 25 seconds, besting the previous record by 25 minutes. Naturally, inquiring minds wanted to know what shoes he was wearing, and some eagle-eyed spectators spotted that the Nike-sponsored athlete looked to be testing out a never-before-seen shoe, that sports some interesting details.

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