There’s a particular kind of person who looks at 171 kilometres and 10,000 metres of elevation gain and sees not a limit, but a starting line. Meet four of them, now part of the TUDOR family.

Courtney Dauwalter, Miao Yao, Rémi Bonnet, and Baptiste Chassagne are, by any measure, some of the most dominant trail runners alive — and now, all four wear TUDOR. Dauwalter completed an unprecedented triple in a single season (Western States, Hardrock 100, and UTMB), all while racing in basketball shorts and pure intuition. Bonnet, a Swiss vertical-kilometre specialist, has built his career on relentless uphill speed in the Alps. Chassagne, still early in his career, is already contending with the sport’s elite. And then there’s Miao Yao — a 21-year-old force from China who became UTMB-CCC champion and UTWT Annual Champion in the same year she broke onto the scene and hasn’t slowed since.

It’s not a stretch to call this partnership natural. TUDOR watches were built to survive extreme conditions long before “extreme” was a marketing word — and elite trail runners, whose whole sport is testing the limits of endurance, are exactly the kind of daring TUDOR has spent a century celebrating.

The Watch Built to Keep Up

That heritage lives in the Ranger, the model anchoring this partnership. Originally designed for expedition use, the Ranger has just expanded to include a 36mm case alongside its classic 39mm — a shift that opens the watch up to a much wider range of wrists without diluting what made it rugged in the first place. Both sizes run on TUDOR’s Manufacture Calibre MT5402, a COSC-certified self-winding movement, housed in a satin-brushed steel case rated to 100 metres of water resistance. The dial options — a warm “Dune White” or matte black — pair with either a fabric strap or steel bracelet, so the watch reads as easily on a trail as it does off one.

Why It’s Miao Yao’s Moment

If one athlete captures why this partnership resonates beyond the podium, it’s Miao Yao. She’s spent her career refusing to be confined by her last win, using the mountains — and increasingly, the road marathon circuit — as a proving ground against her own limits, not just the competition’s. Off the trail, she’s become a quiet force for a new generation of female athletes across Asia, proof that endurance sport doesn’t have to look one way. It’s fitting, then, that the Ranger’s new 36mm size means the same watch that celebrates her wins is genuinely built to fit more wrists than ever — including the growing number of women lacing up for their own version of “impossible.”

That’s the throughline of TUDOR’s “Born to Dare” spirit: it’s about the relentless drive, passion and daring commitment to define limits, which is imbued into every TUDOR watch and exemplified by those who wear it.

Discover the Ranger collection at TUDOR.

Images courteys of TUDOR.