TDLS - Ultra Trail de la Sibérie - BE - 35K 2027
The forecast arrives five days before the start.
Here you'll find the elevation profile and an estimated finish time based on your UTMB Index.
What's your time based on your UTMB?
Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.
Cut-off times and crew - TDLS - Ultra Trail de la Sibérie - BE - 35K · 2027
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| Arrivée | 35.4 | 1,383 m | 35.4 | 1,383 m | 1,382 m | — | — |
Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.
What you'll find at each aid station
Aid station contents not documented.
Elevation profile
The course and its aid stations
TDLS - Ultra Trail de la Sibérie - BE - 35K: times, aid-station stops and fuelling needs by UTMB® Index
Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 5h01 to 3h16, and the aid-station stop budget from 0h06 to 0h02. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium |
|---|---|---|---|---|---|---|
| 500 | 5h01 | 0h06 | — | 301 g | 3.5 L | 2,511 mg |
| 550 | 4h32 | 0h05 | — | 272 g | 3.2 L | 2,266 mg |
| 600 | 4h09 | 0h04 | — | 249 g | 2.9 L | 2,077 mg |
| 650 | 3h52 | 0h04 | — | 232 g | 2.7 L | 1,930 mg |
| 700 | 3h38 | 0h03 | — | 218 g | 2.5 L | 1,817 mg |
| 750 | 3h27 | 0h03 | — | 207 g | 2.4 L | 1,726 mg |
| 800 | 3h16 | 0h02 | — | 196 g | 2.3 L | 1,633 mg |
Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.
Other trails worth preparing for
- Bossière - 33km33 km · 481 m D+ · October 18, 2026
- Burdinne - 23km-night23 km · 526 m D+ · November 13, 2026
- Kasterlee - Halve Natuurmarathon21 km · 100 m D+ · November 15, 2026
- Kasterlee - Natuurmarathon43 km · 200 m D+ · November 15, 2026
- Heusden-Zolder - 21km21 km · 230 m D+ · November 16, 2026
- Vissenaken - 29km29 km · 286 m D+ · November 22, 2026
- Knokke-Heist - 25km24 km · 122 m D+ · November 22, 2026
- Esneux - 23km-night24 km · 509 m D+ · December 5, 2026
- Trail du BW - 42km41 km · 878 m D+ · December 5, 2026
Sources and method
- Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
- Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
- Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — TDLS - Ultra Trail de la Sibérie - BE - 35K
Weather for TDLS - Ultra Trail de la Sibérie - BE - 35K
The weather for TDLS - Ultra Trail de la Sibérie - BE - 35K will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.
Detailed weather for TDLS - Ultra Trail de la Sibérie - BE - 35K, hour by hour on the courseFrequently asked questions
How many checkpoints?
TDLS - Ultra Trail de la Sibérie - BE - 35K has 1 checkpoint: 1 checkpoint with undocumented contents. Details are in the two tables above.
How do I find the exact location of an aid station?
The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.
What distance and elevation gain?
TDLS - Ultra Trail de la Sibérie - BE - 35K is 35 km long with 1383 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 4h09 for TDLS - Ultra Trail de la Sibérie - BE - 35K.
What's the weather forecast?
The weather for TDLS - Ultra Trail de la Sibérie - BE - 35K will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.
Want to stack the odds in your favor for TDLS - Ultra Trail de la Sibérie - BE - 35K?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
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