Grand Trail des Lacs & Châteaux takes place on Sat, May 15, 2027 in Ovifat, Belgium. The main route is 87 km.
- Date
- Sat, May 15, 2027
- Start
- Ovifat 🇧🇪
- Distance
- 87 km
- Climbing
- 3,370 m
- Level
- Open to all
Your 32-week plan to Grand Trail des Lacs & Châteaux
The Base phase starts this week. Built around your fitness and adjusted every day as your form changes; attach the course and it prepares for the climbs too.
Build my planFree to start · No credit card
The Grand Trail des Lacs & Châteaux is a scenic trail running event traversing the rugged landscapes, nature reserves, and historical valleys of the Ardenne Bleue in Belgium.
What this race demands
The Grand Trail des Lacs and Chateaux demands sustained aerobic endurance and muscular resilience over an 87 km ultramarathon distance with 3370 meters of climbing. Athletes must manage heavy vertical gain and significant distance in the spring conditions of the Belgian Ardennes.
Ultramarathon Endurance
Covering 87 km requires high aerobic capacity and advanced pacing discipline to sustain forward motion over many hours.
Climbing Resilience
Accumulating 3370 meters of elevation gain across the Ardenne Bleue valleys demands strong uphill power and eccentric leg strength for descents.
Given the extended duration of an 87 km ultramarathon, athletes should consume 60 to 90 grams of carbohydrates per hour to maintain energy output.
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 Grand Trail des Lacs & Châteaux is 32 weeks away. This is how a coach divides that time. The first phase starts now.
01Base20 weeks · Oct 4, 2026 – Feb 20, 2027
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Feb 21, 2027 – Apr 3, 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 · Apr 4, 2027 – Apr 24, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Apr 25, 2027 – May 8, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · May 9, 2027 – May 15, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Frequently asked questions
When is Grand Trail des Lacs & Châteaux?
Grand Trail des Lacs & Châteaux takes place on Sat, May 15, 2027 in Ovifat, Belgium.
How long is Grand Trail des Lacs & Châteaux?
The main route is 87 km.
What does Grand Trail des Lacs & Châteaux demand?
The Grand Trail des Lacs and Chateaux demands sustained aerobic endurance and muscular resilience over an 87 km ultramarathon distance with 3370 meters of climbing. Athletes must manage heavy vertical gain and significant distance in the spring conditions of the Belgian Ardennes.
How much climbing does Grand Trail des Lacs & Châteaux have?
Grand Trail des Lacs & Châteaux has 3,370 m of climbing.
Who is Grand Trail des Lacs & Châteaux for?
Grand Trail des Lacs & Châteaux is open to all participants.
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