Marathons in Belgium
16 upcoming 42 km marathons in Belgium for 2026 — curated on Run Atlas.
Planning a marathon in Belgium for 2026? Run Atlas lists 16 upcoming 42 km races — from big city events to scenic regional courses.
Whether you are chasing a personal best or your first finish line, comparing dates early helps you secure a start slot and build your training block around the right peak.
Use the calendar below to browse marathons month by month. June 2026 is a busy month in our listings when several races cluster on weekends.
Rain or shine — plan your race day
Calendar of marathons in Belgium
All upcoming 42 km marathons in Belgium, grouped by month.
June 2026
- Les Boucles Ardennaises🇧🇪La Roche-en-Ardenne
Trail runs — 42 km
- G-Recrea🇧🇪Deinze
Road runs — 42.195 km
- De Nacht Van Vlaanderen🇧🇪Torhout
Road runs — 42.195 km
- Marathon du BW🇧🇪Jodoigne
Road runs — 42.195 km, 10 km
- LivinusRun🇧🇪Sint-Lievens-Houtem
Road runs — 5.274 km, 10.548 km
- Lopersgroep Putte - Aflossingsmarathon🇧🇪Stabroek
Road runs — 42.195 km
- Marathon des Hautes Fagnes🇧🇪Sourbrodt
Trail runs — 42 km
August 2026
October 2026
Many runners look for a flagship race in the capital. Brussels often hosts the most iconic marathon in Belgium, but smaller towns offer quieter starts and fast, flat profiles.
Check registration windows as soon as you pick a date — popular spring and autumn weekends fill up months ahead.
World Marathon Majors in Belgium are highlighted separately — bookmark your favourites on Run Atlas and set a RaceAlert when registration opens.
