TDS
TDS crosses 145 kilometres from Courmayeur through the Aosta Valley and Beaufortain with 9,500 metres of climbing before Chamonix in late August.
Quick facts
- 145 kilometres with 9,500 metres of climbing
- Courmayeur-to-Chamonix point-to-point route
- Maximum time of 44 hours 55 minutes
- Night start during UTMB Mont-Blanc week
About the TDS
TDS is UTMB Mont-Blanc week's rugged alternative to the flagship loop. Its own start in Courmayeur, 145-kilometre route and nearly 45-hour limit support a separate race guide and results identity.
Course
The point-to-point Alpine course gains about 9,500 metres while crossing the Aosta Valley, Savoie and Beaufortain toward Chamonix. Technical passes and long descents demand mountain experience.
Race-day weather
Late-August Alpine weather can swing from hot valleys to freezing rain, wind or storms on high passes. Night sections add another temperature cycle to an already exposed course.
Past TDS dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Monday, August 24, 2026 | Upcoming | — |
TDS FAQ
When is the TDS?
The 2026 TDS is on Monday, August 24, 2026.
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