Discover the Sonian Forest like never before

Five unique events. Five different routes. A different part of the Sonian Forest to discover each time.

With the Zoniënwoud Run Series, you will discover one of the most beautiful nature reserves around Brussels in the best possible way: running or walking, surrounded by greenery.

From 10 km to a full marathon, from smooth running along wide forest paths to challenging trails: each event has its own character, route, and experience. And above all: every event takes you to a different part of the vast Sonian Forest. Anyone who takes part in multiple events will discover the forest anew every time.

Walkers too

In addition to runners, walkers can also take part in the 20 km and 30 km through the Sonian Forest.

The series consists of the Sonian Forest Marathon, 30 km through the Sonian Forest, Trail de BXL, Castle Trail La Hulpe, and 20 km through the Sonian Forest.

5 events. One forest. A new adventure every time.

Choose your challenge and discover the Sonian Forest, event after event.