Ultra Running Hub Uccle, Belgium · Saturday, September 5, 2026
Fixed Distance 50K
EcoTrail Brussels 46km
Race completed
46 km Distance
1,024 m Climbing
3.8 Grit · Challenging
What the course asks
Climbing rate 22 m / km
Rolling. Moderate undulations. Requires consistent effort across varying grades.
Time limit 16 hours
20:52 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 50K cut-offs we track. Measured against 1007 races of the same distance. Cut-off calculator →
Field size ~120 Mid-sized. Company early, well spread out by halfway.
DUV results for the 2025 edition (52km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, September
Daytime high 20°C
Night low 10°C
Rainfall Mostly dry
Daylight 13 h 21 m of light
Regional 2001-2020 average for September — NASA POWER, grid elevation 37 m. Not a forecast.
The Aid Station
Course-specific beta from the community
This is a rolling course. Expect fast, runnable sections where rhythm is key.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 46 km of trail with 1,024 m of ascent.
- Trail Running Shoes22 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition46 km of self-supported fuelling between aid stations.
- Hydration VestsPole attachment and chest-strap stability on steep ground.
- Trekking Poles1,024 m of ascent to walk up.
- HeadlampsA 16 h limit puts you out there after dark.
Course Notes
The 46k course will offer you a maximum of singletracks.
Similar races
Other 50K trail ultras, closest in distance first.