UTMB Mont-Blanc TDS 2026
Also known as: TDS® · Sur les Traces des Ducs de Savoie · UTMB TDS
The name means "on the trail of the Dukes of Savoy". It starts from Courmayeur close to midnight and links the Aosta Valley to Savoie, passing through the Beaufortain on its way to Chamonix, including the Pas d'Outray with its view of the Pierra Menta and the hamlets of Hauteluce. It is known as a technical, wild and demanding mountain course.
The course tops out at 2,589 m (low point 721 m). There are 4 big climbs: 1,191 m around 0–12 km; 1,748 m around 48–60 km; 1,387 m around 90–109 km; 970 m around 118–125 km. Only about 30% is gentle (under 5% grade); most of it is climbing or descending. The median finish was about 38 h, through 2 nights.
Predict your finish from your ITRA index
Enter your ITRA performance index to get your finish time, aid-station splits and cutoff margins from the results of 20 finishers of this race — the same model as the TRAIL STATUS app. Nothing is saved or sent.
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Predict in detail from my Strava trainingOverview
- Date
- Mon, 24 Aug 2026
- Start
- 23:50
- Location
- Italy
- Distance
- 145 km
- Elevation gain
- 9,500 m
- Time limit
- 44h 55m
- ITRA
- 100M
- Official website
- montblanc.utmb.world/races/tds
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 7.7 km | Aid 1Checrouit - Maison Vielle（水のみ） | 7.7 km | — |
| 2 | 16.5 km | Lac Combal | 8.7 km | Day 2 03:303h 40m |
| 3 | 36.2 km | La Thuile - Petit Saint Bernard | 19.8 km | Day 2 08:308h 40m |
| 4 | 47.5 km | Aid 4Séez（水のみ） | 11.3 km | — |
| 5 | 51.1 km | Bourg Saint-Maurice | 3.5 km | Day 2 11:0011h 10m |
| 6 | 55.7 km | Aid 6Fort de la Platte（関門のみ・エイドなし） | 4.6 km | Day 2 13:4513h 55m |
| 7 | 66.1 km | Cormet de Roselend | 10.4 km | Day 2 17:1517h 25m |
| 8 | 73.6 km | La Gittaz | 7.5 km | Day 2 19:3019h 40m |
| 9 | 92.3 km | Aid 9Beaufort（温かい食事・ドロップバッグ） | 18.7 km | Day 3 03:0027h 10m |
| 10 | 98.6 km | Hauteluce | 6.3 km | Day 3 05:3029h 40m |
| 11 | 115.4 km | Le Signal | 16.8 km | Day 3 11:1535h 25m |
| 12 | 122.9 km | Les Contamines Montjoie | 7.4 km | Day 3 13:1537h 25m |
| 13 | 136.8 km | Aid 13Bellevue（関門のみ・エイドなし） | 14 km | Day 3 18:1542h 25m |
| 14 | 141.4 km | Les Houches | 4.6 km | Day 3 19:1543h 25m |
| F | 145 km | FINISH Chamonix | 3.6 km | Day 3 20:4544h 55m |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2026 results
715 finishers. Finish times of those who finished:
- Fastest
- 19h 29m
- Top 10%
- 28h 25m
- Top 25%
- 33h 15m
- Median
- 37h 31m
- Top 75%
- 41h 24m
- Top 90%
- 43h 39m
- Last finisher
- 44h 55m
"Top 25%" means one in four finishers had crossed the line by this time.
Years with a different course or different cutoffs are not directly comparable.
Other races
- UTMB Mont-Blanc CCC 2026Fri, 28 Aug 2026 · Italy · 108 km
- Lavaredo Ultra Trail by UTMB 120K (Dolomites, Italy) 2026Fri, 26 Jun 2026 · Italy · 122.4 km
- Lavaredo Ultra Trail by UTMB 80K (Dolomites, Italy) 2026Sat, 27 Jun 2026 · Italy · 80.3 km
- TOR330 Tor des Géants (Aosta Valley, Italy) 2026Sun, 13 Sep 2026 · Italy · 336.5 km
- UTMB Mont-Blanc ETC 2026Tue, 25 Aug 2026 · Italy · 15 km
- UTMB Mont-Blanc YCC (youth) 2026Tue, 25 Aug 2026 · Italy · 15 km
From your training log, TRAIL STATUS estimates your finish time, aid-station splits and cutoff margins for this race.
Predict my raceCompiled from each race's official information. Details can change, so always check the race's official website for the latest. Spotted a mistake? Please tell us through the contact form.
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