Trail Godefroy Bouillon

Race completed

100 km Distance

3,100 m Climbing

9.7 Grit · Elite / extreme

49.7932° N, 5.0670° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 31 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 20 hours 12:00 min/km average. Generous. Walkable throughout for most of the field. More forgiving than 72% of 100K races. Measured against 208 races of the same distance. Cut-off calculator →

Field size ~108 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, June

Daytime high 21°C

Night low 11°C

Rainfall Mostly dry

Daylight 16 h 09 m of light

Regional 2001-2020 average for June — NASA POWER, grid elevation 295 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a rolling course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 100 km of trail with 3,100 m of ascent.

Trail Running Shoes31 m of climb per kilometre — grip and rock protection before cushioning.
Race NutritionPast 100 km the palate quits before the legs do — carry more than one flavour.
Hydration VestsPole attachment and chest-strap stability on steep ground.
Trekking Poles3,100 m of ascent to walk up.
HeadlampsA 20 h limit puts you out there after dark.

Adidas