← All eventsTDS (Sur les Traces des Ducs de Savoie)
The most technical UTMB-week race — ~145km / ~9,100m of remote, high, wild trails from Courmayeur to Chamonix. Next-date approximate (UTMB week, late August).
The most technical race of UTMB week. 145km from Courmayeur to Chamonix by the wild, high, western side of Mont-Blanc, with 9,100m of climbing and the same again in descent.
Scree, exposed passes and steep loose descents through the Beaufortain. Here sure-footedness matters as much as fitness, out for one or two nights on remote, unforgiving ground.
The 44-hour cutoff sounds generous. It is not the point. TDS is decided by skill on rough ground, not leg speed, and entry by qualification and lottery means most starters already have technical ultras behind them.
Who finishes, and how
Patterns like these, drawn straight from 2025 race data, are baked into how Beina coaches you for this event.
Is TDS (Sur les Traces des Ducs de Savoie) for you?
- Runners who descend well. On TDS's loose, steep, exposed descents, sure-footedness and durable quads gain far more time than raw fitness.
- Experienced mountain-ultra finishers. Entry is qualification plus lottery, and the terrain rewards people who already know how to move on scree and rock.
- Patient climbers who power-hike. With 9,100m to gain, the best days come from a talkable effort on the ascents, not racing them.
- Anyone at home out at night on rough ground. One or two nights on exposed passes is a defining part of the challenge, not a footnote.
Training plan for TDS (Sur les Traces des Ducs de Savoie)
A training plan for TDS (Sur les Traces des Ducs de Savoie) isn't a generic base build. Beina reads the event's exact demands, looks at your specific profile and the time you actually have, and maps a highly adapted plan to the start line.
- 9,100m of climbing and the same again in steep, loose descent across 145km
- The most technical UTMB-week terrain: scree, exposed passes, rocky ground
- One to two nights on your feet on remote, exposed trail
- Fuelling and staying upright for anywhere from 15 to 44 hours
- Long technical mountain runs, 3 to 6 hours on genuinely rocky, exposed ground
- Big technical back-to-back weekends, Saturday 7h then Sunday 4h on tired legs
- Technical downhill repeats, 6 to 10 steep loose descents for quads and footwork
- Pole power-hike repeats and technical night runs as the race nears
- Built from your current fitness and the time you actually have
- Adapts every week as Beina learns how you respond
- Syncs your sessions straight to Garmin and Wahoo
- One clear next session, never a wall of spreadsheet
