145 kmTrail🇮🇹 Courmayeur, Italy

TDS (Sur les Traces des Ducs de Savoie)

Monday, 23 August 2027Estimated dateIn 10 months · Start 23:50

The wildest of the UTMB races, from Courmayeur over remote high passes of the Beaufortain and Tarentaise back to Chamonix.

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Facts checked 10 Oct 2026 against montblanc.utmb.world, montblanc.utmb.world.

Elevation gain

9,500 m

Mountain · ↓ 9,690 m

Start altitude

1,219 m

above sea level, from terrain data

Temp at start

15°C

Peaks around 15°C

Entry fee

≈ $360

Lottery + qualifying

Finishers

—

typical year

Course

Point to point

44.9h cut-off

Getting thereFly into TRN (Caselle Torinese (TO)), about 84 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Mountain: about 9,500 m of climbing and 9,690 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

15°C

Peak during race

15°C

Humidity

85%

Chance of rain

Wind

4 km/h

Race day in past years

Historical averages for 23 August ±3 days, 2016–2025, from 23:50 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/tds" title="TDS (Sur les Traces des Ducs de Savoie) on iRun42"><img src="https://irun42.com/badge/tds.svg" width="300" height="120" alt="TDS (Sur les Traces des Ducs de Savoie): course, elevation and race-day weather on iRun42" /></a>