Chaumont-Gistoux, Belgium · Sunday, December 6, 2026

Fixed Distance 50 mi

Trail du BW - 62km

29 days to go

62 km Distance

1,180 m Climbing

4.9 Grit · Challenging

50.6775° N, 4.7212° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 19 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 10 hours 9:41 min/km average. Comfortable. Room to walk the climbs and stop at aid. Tighter than 80% of 50 mi races. Measured against 486 races of the same distance. Cut-off calculator →

Field size ~77 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (62km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daytime high 5°C

Night low 0°C

Rainfall Mostly dry

Daylight 8 h 11 m of light

Regional 2001-2020 average for December — NASA POWER, grid elevation 177 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

Gear for this race

Chosen for 62 km of trail with 1,180 m of ascent.

Trail Running Shoes62 km of trail — cushioning that is still there in the last quarter.
Race Nutrition62 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 62 km, without the bounce.
GPS WatchesBattery life first — a 62 km day outlasts most full-GPS modes.

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

New Balance