20 km Door Het Zoniënwoud - De La Forêt de Soignes

About this event

The 20 km Door Het Zoniënwoud takes runners through the ancient beech forests of Sonian Forest, just outside Brussels. This historic woodland, with its cathedral-like canopy and network of trails, offers a surprisingly wild escape despite being close to the city. The 20km route combines technical forest paths with 315 meters of rolling elevation, making it a solid challenge for runners with some trail experience. Spring timing means fresh green leaves overhead and potentially muddy sections that add character to the course. The bilingual name reflects the forest's position straddling Belgium's linguistic communities, and runners often appreciate the event's low-key, authentic atmosphere focused purely on the joy of running through beautiful woods.

Distances