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Ultras · IT · Aosta Valley

TDS

TDS 2026
Scheduled
The 2026 edition routes through the Beaufortain (Bourg St Maurice, Cormet de Roselend, Beaufort, Hauteluce, Les Contamines) in addition to the traditional Courmayeur departure.
Race dateAugust 24-26, 2026
Duration3 days
Start11:50pm
Whenin 2 days
Official website Entry Lottery Aid stations
Free, and always will be. NavRun makes money from race-day planning for runners who want it, never from this. Ultras change constantly, sometimes the morning of. Always confirm with the race director and the official website before you rely on anything here.
Distance 145K
Climb 32,730 ft
Descent 33,346 ft
High point 8,520 ft
Time limit 44:55:00
Aid stations 25
Started not checked yet
Finished not checked yet
Finish rate not checked yet
The course

Where it goes point to point · 25 aid stations

Sur les Traces des Ducs de Savoie ('following the footprints of the Dukes of Savoie'): a point-to-point 100-mile-category race from Courmayeur, Italy, through the Aosta Valley and across the Franco-Italian border, into the Beaufortain (Bourg St Maurice, Cormet de Roselend, Beaufort, Hauteluce, Les Contamines) before finishing in Chamonix, France. Widely regarded as more technical and exposed than UTMB itself.

The race

What this one is

Sur les Traces des Ducs de Savoie: a 100-mile-category race starting in Courmayeur, Italy, crossing into France through the Beaufortain region before finishing in Chamonix. Known for more technical and exposed terrain than UTMB itself.

Getting in

Getting in Entry, lottery and what the race asks of you before race day.

Lottery
not checked yet
Lottery opens
not checked yet
Lottery draw
not checked yet
Field cap
not checked yet
Registration
UTMB montblanc.utmb.world
Qualifying
Requires a valid UTMB Index in category 100K or 100M. Elite runners receive no priority or fee advantage registering for TDS (unlike UTMB/CCC/OCC); in the event of a full race, elite runners (UTMB Index >820 men / >695 women) may contact the organizer for individual review. montblanc.utmb.world
Minimum age
20 montblanc.utmb.world
Transfers
No montblanc.utmb.world
Deferrals
No montblanc.utmb.world
Crew, pacers and drop bags

The rules that shape your day Anything marked "not checked yet" is a gap in what we hold, never a no from the race.

Crew allowed
Yes HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.43 'TDS REGULATIONS: crewing and assistance'
Vehicles per runner
not checked yet
Pacers
No montblanc.utmb.world
Muling
Not allowed HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.43 'TDS REGULATIONS: crewing and assistance'
Drop bags
Yes HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.42 'TDS REGULATIONS: spare bags
Cupless
Yes montblanc.utmb.world
Course marking
Fully Marked montblanc.utmb.world
Night running
Yes montblanc.utmb.world
Dogs
Not allowed montblanc.utmb.world
Headphones
Allowed montblanc.utmb.world
Crew rules
Personal assistance (one assistant at a time, from a ticket, in a marked zone only) is tolerated at exactly three stations: Bourg St Maurice, Beaufort and Les Contamines. The assistant may hand over a single bag of up to 30 litres; professional/medical crew assistance is strictly forbidden. Outside these three stations and their ~500m tolerance zones, no assistance or accompanying is allowed anywhere on course. HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.43 'TDS REGULATIONS: crewing and assistance'
Pacer rules
Again, to ensure equality between competitors ... it is forbidden to be accompanied during all or part of the race by a person who is not a participant, outside of the zones of tolerance ... This authorizes short walks for family and friends but forbids pace setters. HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.43 'TDS REGULATIONS: crewing and assistance'
Drop bag rules
Each runner gets the standard one 30L organizer spare bag (dropped at Courmayeur, Piazzale Monte Bianco, Monday 22:30-23:45; picked up at Chamonix Centre Sportif). TDS additionally issues ONE separate bag usable mid-race only at Beaufort: collected on arrival, dropped off again when leaving, for personal items only (no poles, no valuables); return timing to Chamonix depends on logistics and may be delayed for early dropouts. HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.42 'TDS REGULATIONS: spare bags
Cutoff philosophy
A runner must leave each checkpoint before its published time barrier to continue. Barriers run from Lac Combal (day+1, 03:30) through Bourg St Maurice, Cormet de Roselend, La Gittaz, Beaufort, Hauteluce, Le Signal, Les Contamines, Bellevue and Les Houches, to the Chamonix finish barrier at day+2, 20:45 (44h55 after the Monday 23:50 start). A runner stopped by a barrier is bibbed-out and transported back by the organizer. HOKA UTMB Mont-Blanc 2026 Runner's Guide (Issuu), p.41 'TDS TIME CHARTS'
Aid stations

Every stop, and what you get there ● yes   · no   ? nobody has checked   – does not apply to this race

Mile Station Cutoff Crew Bag Pacer Med To next
0.00 Courmayeur
4,009 ft
 ? · · ? ● 4.04
4.04 Checrouit - Maison Vieille
6,434 ft
 ? · · ? ● 2.73
6.77 Arete du Mont-Favre
7,851 ft
 ? · · ? ? 1.93
8.70 Lac Combal
6,460 ft
 3:30am · · ? ● 3.35
12.05 Col Chavannes
8,520 ft
 ? · · ? ? 10.32
22.37 La Thuile - Petit St Bernard
7,169 ft
 8:30am · · ? ● 6.77
29.14 Seez
2,913 ft
 ? · · ? ? 2.05
31.19 Bourg St Maurice
2,743 ft
 11:00am ● · ? ● 3.05
34.24 Fort de la Platte
6,453 ft
 1:45pm · · ? ? 3.73
37.97 Passeur de Pralognan
8,346 ft
 ? · · ? ? 2.67
40.64 Cormet de Roselend
6,460 ft
 5:15pm · · ? ● 1.74
42.38 Col de la Sauce
7,552 ft
 ? · · ? ? 2.92
45.30 La Gittaz
5,400 ft
 7:30pm · · ? ● 6.52
51.82 Pas d'Outray
7,011 ft
 ? · · ? ? 5.16
56.98 Beaufort
2,448 ft
 3:00am ● ● ? ● 4.04
61.02 Hauteluce
3,701 ft
 5:30am · · ? ● 5.03
66.05 Chalet du Berger
5,833 ft
 ? · · ? ? 5.10
71.15 Le Signal
6,129 ft
 11:15am · · ? ● 2.30
73.45 Notre Dame de la Gorge
4,009 ft
 ? · · ? ? 2.48
75.93 Les Contamines
3,727 ft
 1:15pm ● · ? ● 2.18
78.11 Chalets du Truc
5,640 ft
 ? · · ? ? 2.30
80.41 Col de Tricot
6,932 ft
 ? · · ? ? 2.73
83.14 Bellevue
5,853 ft
 6:15pm · · ? ? 2.86
86.00 Les Houches
3,314 ft
 7:15pm · · ? ● 4.84
90.84 Chamonix
3,396 ft
 8:45pm · · ? ● ?
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