TDS is a 153 km ultra trail of HOKA UTMB Mont-Blanc 2025 in Chamonix, France. The race starts on August 27, 2025. The course climbs 9100 m+ and descends 9227 m−, between a low point of 727 m and a high point of 2585 m. By gradient, 40% of the distance is uphill, 40% downhill and 20% flat. The longest climb runs 9.1 km at an average 12.7% grade (1146 m of vertical). The longest descent runs 8.4 km at 14.0% (1179 m of vertical). Surface: 64% trail, 18% road, 10% technical, and 6% smooth. Flat-equivalent effort: 238.6 FlatKM.
1,207 finishers completed the 2025 edition. Men's winner: Antoine Charvolin (France) in 18:22:17. Women's winner: Careth Arnold (United States) in 22:58:52.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for TDS.
Other distances of HOKA UTMB Mont-Blanc 2025UTMB (176 km)·CCC (101 km)·OCC (57.0 km)·MCC (40.0 km)·ETC (15.0 km)·YCC (15.0 km)
Other editions of TDS2026
Official websitemontblanc.utmb.world
