Hamont-Achel - 21km 2026
Forecast published: 43°F feels-like at the coldest, 51°F at the warmest, no notable rain.
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 - Hamont-Achel - 21km · 2026
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| Arrivée | 20.8 | 39 m | 20.8 | 39 m | 45 m | — | Sat 04:30 PM | — |
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
Hamont-Achel - 21km: 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 1h58 to 1h17, and the aid-station stop budget from 0h02 to 0h01. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
Below a UTMB® Index of roughly 335, the overall cut-off of 2h45 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 1h58 | 0h02 | — | 118 g | 1.4 L | 986 mg | +0h47 |
| 550 | 1h49 | 0h02 | — | 109 g | 1.3 L | 907 mg | +0h56 |
| 600 | 1h40 | 0h01 | — | 100 g | 1.2 L | 835 mg | +1h05 |
| 650 | 1h34 | 0h01 | — | 94 g | 1.1 L | 785 mg | +1h11 |
| 700 | 1h28 | 0h01 | — | 88 g | 1 L | 737 mg | +1h17 |
| 750 | 1h23 | 0h01 | — | 83 g | 1 L | 692 mg | +1h22 |
| 800 | 1h17 | 0h01 | — | 77 g | 0.9 L | 643 mg | +1h28 |
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
- Hamont-Achel - 15km15 km · 39 m D+ · October 31, 2026
- Hamont-Achel - 25km25 km · 58 m D+ · October 31, 2026
- Diever - 31km32 km · 118 m D+ · December 12, 2026
- Dwingelderveld - 15km15 km · 66 m D+ · December 12, 2026
- Diever - 21km21 km · 70 m D+ · December 12, 2026
- Dwingelderveld - 26km27 km · 101 m D+ · December 12, 2026
- Heilig Landstichting - 21km20 km · 412 m D+ · December 13, 2026
- Eijsden - Rabo Mescherbergloop16 km · 336 m D+ · December 13, 2026
- Heilig Landstichting - 16km16 km · 286 m D+ · December 13, 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 — Hamont-Achel - 21km
Weather for Hamont-Achel - 21km
Section-by-section forecasts for Hamont-Achel - 21km, calculated at the estimated passing time: feels-like temperature, rain or snow, wind and thunderstorms. Three models — AROME (Météo-France), ICON (DWD) and ECMWF IFS — served from the finest to the farthest-reaching.
Forecasts for a 600 UTMB Index runner, at their estimated passage time. Start Sat, 10/31 01:45 PM: Clear sky, 48°F. Coldest: 43°F feels-like at Arrivée (Sat, 10/31 03:25 PM); warmest: 51°F at Arrivée (Sat, 10/31 03:25 PM). No notable rain forecast on the course. Gusts up to 13 mph at Start.
Forecast, not guaranteed: in the mountains a model describes a grid of several hundred meters, not the slope you're on.
Weather data: Météo-France (AROME), DWD (ICON), ECMWF (IFS) — CC BY 4.0, via Open-Meteo
Frequently asked questions
How many checkpoints?
Hamont-Achel - 21km has 1 checkpoint: 1 checkpoint with undocumented contents. Details are in the two tables above.
What distance and elevation gain?
Hamont-Achel - 21km is 21 km long with 39 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 1h40 for Hamont-Achel - 21km.
What's the weather forecast?
Forecast published: 43°F feels-like at the coldest, 51°F at the warmest, no notable rain. RAVIT publishes the weather for Hamont-Achel - 21km section by section: feels-like temperature, rain or snow, wind and storms, at the estimated passage time. Forecasts come from AROME (Météo-France), ICON (DWD) and ECMWF IFS, refreshed several times a day.
Want to stack the odds in your favor for Hamont-Achel - 21km?
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