Trail des Bosses

Discover the hidden trails and forbidden paths of one of Belgium's most enchanting woodlands at the **Trail des Bosses on Saturday, March 21, 2026**. Nestled in the heart of the Bois de la Houssière near Braine-le-Comte, this intimate and fiercely authentic trail event invites runners to explore the forest "sous toutes ses coutures"—through sections usually closed to the public, across undulating terrain that justifies every syllable of its name. Three distances cater to every ambition: the 15km "Petites Bosses" offers a concentrated introduction; the 25km "Moyennes Bosses" deepens the commitment; and the 35km "Grandes Bosses" delivers the full Houssière immersion. Each route is drawn exclusively within this sylvan sanctuary, promising views and singletrack reserved for this single day.
The day unfolds with military precision from the Athénée Royale de Braine-le-Comte, where runners collect bibs against strict cut-off times—7:40 for the 35km warriors, 8:40 for the 25km challengers, 9:10 for the 15km discoverers. Ravitaillements punctuate each course: one for the 15km, two for its longer siblings, offering sustenance and solidarity before the final push. Registration opens December 6, 2025, with fees ranging from a modest €10 to €16—proof that world-class trail experiences need not carry world-class price tags. Parking flows into designated zones bleues; access is straightforward, the welcome guaranteed warm.

What distinguishes the Trail des Bosses is its refusal to overreach. No UTMB points, no live tracking, no corporate activation village. Just pure, unmediated trail running on terrain that rewards the curious and challenges the complacent. The organising team, rooted in local running culture, has crafted courses that reveal the Houssière's character: its quiet glades, its sudden dips, its muscular climbs that give the event its name. Serez-vous "Trail des bosses"? The question hangs in the March air, answered only by those who toe the line. Registration opens in December. The forest waits. The bosses beckon.