Marathon des Hautes Fagnes takes place on Sun, Jun 27, 2027 in Sourbrodt, Belgium. The main route is 42 km.
- Date
- Sun, Jun 27, 2027
- Start
- Sourbrodt 🇧🇪
- Distance
- 42 km
- Climbing
- 605 m
- Level
- Open to all
Starting and finishing at the Belgium Peak Beer brewery in Sourbrodt, this trail marathon takes runners through wild landscapes and multiple high-altitude fens.
Official event pageWhat this race demands
This trail marathon requires sustained endurance over a 42-kilometer distance combined with rolling elevation changes.
Distance endurance
The 42-kilometer distance demands a robust aerobic base and muscular resilience to maintain running economy deep into the second half of the race.
Terrain adaptability
Traversing high-altitude fens and wild landscapes requires efficient pacing on uneven surfaces and steady uphill climbing across 605 meters of total elevation gain.
Thermal management
A late-June race date in Belgium exposes runners to potential summer heat and variable weather conditions that require disciplined hydration and electrolyte management.
A duration exceeding three to four hours requires a consistent carbohydrate intake of 60 to 90 grams per hour to sustain output and prevent late-race energy depletion.
Estimated finish times
Estimates by level, not promises. Your own number depends on your fitness on the day.
Your road to race day
Race day at Marathon des Hautes Fagnes is 44 weeks away. This is how a coach divides that time. The first phase starts now.
01Base32 weeks · Aug 24, 2026 – Apr 4, 2027
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Apr 5, 2027 – May 16, 2027
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
03Peak3 weeks · May 17, 2027 – Jun 6, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Jun 7, 2027 – Jun 20, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Jun 21, 2027 – Jun 27, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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