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

Fixed Distance 50 mi

Trail du BW - 84km

81 days away

85 km Distance

1,550 m Climbing

6.6 Grit · Hardcore

What the course asks

Climbing rate 18 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 12 hours 8:28 min/km average. Comfortable. Room to walk the climbs and stop at aid. Among the tightest 50 mi cut-offs we track. Measured against 455 races of the same distance. Cut-off calculator →

Field size ~64 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (84km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

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 85 km of trail with 1,550 m of ascent.

Trail Running Shoes85 km of trail — cushioning that is still there in the last quarter.
Race Nutrition85 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 85 km, without the bounce.
HeadlampsA 12 h limit puts you out there after dark.
GPS WatchesBattery life first — a 85 km day outlasts most full-GPS modes.

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Salomon