F.A.Q
It is advisable to choose the option that suits you best; you can choose between:
A 11.70 km course with 160 m of elevation gain
Fast Race (limited to 150 participants) or free start
A 7.11 km course with 97 m of elevation gain
An 800 m course on the track of the Stade des 3 Tilleuls
A 1,600 m course on the track of the Stade des 3 Tilleuls
Registration is done online through our website. Sign up now for our newsletter so you don't miss this unique opportunity!
Registrations are non-refundable, but it is possible to transfer your bib to someone else. A bib transfer costs €5 in administrative fees. Bib transfers are allowed until October 22 at midnight.
Race bibs are not sent by mail — they must be collected at designated pickup locations.
- Before the race, until October 23, 2025.
- Beautiful Sports Avenue Charles Schaller 52, 1160 Auderghem (20, 21, 22 october from 13h to 17h)
- Maison Haute de Watermael-Boitsfort, Pl. Antoine Gilson 1, 1170 Watermael-Boitsfort
Pickup possible on Tuesday, October 21 and Thursday, October 23 from 1 p.m. to 5 p.m.
- On race day, at the terrace of the “Club du Stade” in the Stade des 3 Tilleuls.
You can collect your race bib on-site between 8:30 a.m. and 10:00 a.m. The starts will be open from 10:00 a.m. to 10:30 a.m.
1. Securing the course with the police and route marshals
2. A medal for all finishers
3. Official timing with chip bibs
4. Entertainment along the course
5. A five-star refreshment station
The race office is located on the terrace of the “Club du Stade” bar
Av. des Nymphes 1A, 1170 Watermael-Boitsfort
Car: Parking spaces are limited around the Stade des 3 Tilleuls. Please note that Rue des Sylphes and Rue des Nymphes will be completely closed to traffic.
Bike: A bicycle parking area will be available for several hundred bikes in the Calypso Pool parking lot. Av. Léopold Wiener 60, 1170 Watermael-Boitsfort
Public transport: Several options are available to reach the Stade des 3 Tilleuls.
Bus :
95 & 17 - stop Vander Elst, Calypso 2000 et Les 3 Tilleuls
41 - stop Archiducs
Tram
8 - Fauconnerie
Metro :
Beaulieu & Demey
Saturday, October 25, 2025
08:30 – 10:00: Opening of the race office, bib collection for RUNNERS
800 m start at 9:15 on the athletics track
1,600 m start at 9:30 on the athletics track
Start "Racing" at 10:00
Free RUN start between 10:05 and 11:00
12:00: Closing of the refreshment station at the Maison Communale
13:00: Final finish
Fast Race podium for the top three runners at 11:30
Run podium for the top three runners at 11:35
The 11.70 km Urban Trail of WB is a sporting race, with 85% taking place on roads. Some paths and sections are off-road. Over the 11.70 km course, there will be 160 meters of elevation gain.
A mass start for competitive runners will take place at 10:00 (a Fast Race bib is required to take part in this start). To avoid the crowd, it is also possible to start freely until 10:30.
The time displayed will be your real time.
Showers will be available in the sports center.
Before the start, only runners may drop off a sports bag at the “bag drop” stand. Please bring a bag that closes securely, as open bags or loose items will not be accepted. Your bag will be assigned a number, which will also be written on your bib. Without your bib, you will not be able to collect your bag!
The bag drop opens around 9:00 and closes at 13:30.
The bag drop service costs €1 (cash only).
The refreshment station is located halfway along the course, at the Watermael-Boitsfort town hall.
Water will be available in reusable cups, which must be thrown directly into the containers provided on site.
Oranges and waffles will also be available.
All participants are asked to respect the environment by not throwing anything along the route and by using the bins provided if necessary. It’s a matter of good manners, we’re counting on you!
Everyone will receive a medal after the race. Don’t forget to pick yours up!
Please remember that we do not send medals by post!
Yes, it will be possible to buy food and drinks from our partner, the Club du Stade.
Of course! Spectators are welcome, and entry is free so they can cheer you on and enjoy the on-site activities.
We have implemented a precise and reliable system to track your performance in real time.
One or two timing chips are attached to the back of your bib. Do not fold the chip(s), and make sure to wear your bib on top of your clothing, on your stomach or chest. The chips record your time when you pass the checkpoints.
Finish times can be followed live on the UltraTiming website. On the day of the event, results can be tracked live on https://www.ultratiming.live/en/resultats.