September 5, 2026
September 5, 2026
January 1, 2026
September 4, 2026

46 km trail

A course for experienced riders
September 5, 2026
September 5, 2026
Departure:
Uccle-Boitsfort Racecourse
Arrival:
Uccle-Boitsfort Racecourse

The itinerary in detail

An adventure combining nature, heritage, and sporting challenges

The 46 km route is intended for experienced trail runners, even though the elevation gain is reasonable. It plunges into the Sonian Forest via some beautiful single tracks, skirts around the magnificent Château de La Hulpe, and crosses several nature reserves and remarkable sites before bringing you back to the Uccle-Boitsfort racecourse. A surprising route in the heart of the green lung of the European capital.

Upon your arrival, the finish village will be transformed into a welcoming venue to greet you and extend the enjoyment beyond the race.

46 km trail

Essential information

05
September 5, 2026
2026
Distance:
46 miles
Departure time:
At 8:30 a.m.
D+:
Time limit:
UTMB Qualifier:
20K
50K
100K
Finisher rate:
ITRA points:
0
1
2
3
% Nature:
85%
Participants:

Ready to get started?

All our tips to be ready on the big day

Distribution of race numbers

Identification document

Upcoming dates

  • Trakks Brussels (Uccle): Chaussée de Waterloo 1165B, 1180 Uccle
  • Trakks Brussels (Etterbeek): Steenweg op Etterbeek 59, 1000 Brussels

Friday, September 4, between 5 and 7 p.m.

  • Boitsfort Racecourse - 53 Chaussée de la Hulpe, 1180 Uccle (opposite 114)

On Saturday, September 5, starting one hour before the races begin

  • Boitsfort Racecourse - 53 Chaussée de la Hulpe, 1180 Uccle (opposite 114)

D-Day

Uccle-Boitsfort Racecourse

Find all the information here

At 8:30 a.m.

Post-race meal

Why carpool?

Can't get there by public transportation? Carpooling is an economical, eco-friendly, and fun solution.

The advantages:

  • Reduce your travel expenses
  • Reduce your carbon footprint
  • Make it easy to get to the event
  • Connect with other trail enthusiasts

Need a ride? Post or find an ad on CovEvent.

Required equipment

The essentials for running safely

Food reserve

Snacks such as energy bars or gels
Penalty:

Minimum 15cl cup

For drinking at aid stations
Penalty:

Survival blanket

In case of hypothermia or injury
Penalty:

Cell phone

With a charged battery and an emergency contact number
Penalty:

Identification document

Paper format or copies accepted
Penalty:

Method of payment

To deal with the unexpected
Penalty:

Minimum water reserve 1.5L

To stay hydrated throughout the race
Penalty:

Headlamp / chest lamp

Useful in low light conditions or tunnels
Penalty:

They did it!

Relive the EcoTrail in pictures

Moments of achievement, sharing, and emotion, captured in the heart of nature and in the heart of Brussels. Welcome to the world of EcoTrail.

No items found.

Preparing well for your EcoTrail

What you need to know to run with peace of mind

Got a question on your mind?

All the answers to your questions before departure

Everything you need to know before running

Race rules, safety, and data management

Our other races

Find your next adventure
80 km trail

80 km trail

A major challenge for ultra-trail enthusiasts seeking an extraordinary experience.

September 5, 2026
Pre-registration
Registration is now open
Registration closed
80 km RBB

80 km RBB

A huge collective challenge for a formidable trio!

September 5, 2026
Pre-registration
Registration is now open
Registration closed
24 km trail

24 km trail

An accessible but technical trail in the heart of the Sonian Forest.

September 5, 2026
Pre-registration
Registration is now open
Registration closed
10 km trail

10 km trail

The most popular distance, perfect for discovering the unique features of trail running.

September 5, 2026
Pre-registration
Registration is now open
Registration closed
5 km trail

5 km trail

A gentle introduction to trail running, 100% nature, accessible to all.

September 5, 2026
Pre-registration
Registration is now open
Registration closed
Kids

Kids

A gentle introduction to trail running, 100% nature, accessible to all.

September 5, 2026
Pre-registration
Registration is now open
Registration closed
Walk 24 km

Walk 24 km

An accessible but technical hike in the heart of the Sonian Forest.

September 5, 2026
Pre-registration
Registration is now open
Registration closed
10 km walk

10 km walk

The perfect distance to discover the Sonian Forest

September 5, 2026
Pre-registration
Registration is now open
Registration closed
5 km walk

5 km walk

A gentle walk, 100% natural, accessible to all.

September 5, 2026
Pre-registration
Registration is now open
Registration closed