On 9 July 2026, François D'haene did what no runner had managed before. He crossed Corsica on the GR20 in a supported Fastest Known Time of 29:46:20, becoming the first person to complete the roughly 180 km route in under 30 hours.
A barrier broken high in the Corsican mountains
The GR20 is not a forgiving theatre. Its relentless climbs and technical descents across granite ridgelines have defeated many ambitions. D'haene set out to dismantle the 30-hour wall, and over a single long push he carved away the minutes until the barrier fell.
The final time, confirmed shortly after he stopped the clock, rewrites the route's history. Where others had measured their efforts against the terrain itself, D'haene measured his against the clock and won.
A career built on mountain tempo
The achievement sits naturally in a career defined by patience and elevation. D'haene, a three-time UTMB champion, has long understood how to pace suffering across vast distances. His move to the GR20 brought that same steady, high-mountain rhythm to the Mediterranean island.
This FKT does not replace his ultra-trail palmarès but extends it. He has now left a mark on both the classic race circuit and the pure, unsanctioned pursuit of speed across a single grand route.
A quiet closing stanza
No celebrations spilled onto the trail. Just a watch stopped, a time noted, and a new benchmark set in the granite spine of Corsica. For a runner who has often let his splits speak, the numbers on this July day were more than enough.
