Races
Grand Trail des Lacs et Châteaux
Belgium, May. 165 km on 75% trail. +1,058 ft of climbing. 40 hours cutoff.
- Start269 ft
- High289 ft
- Low227 ft
- Finish240 ft
Geometryderived
The cruxForest trails, rolling cols, and weather swings (near mile 67)
Course DNA
The Course
Grand Trail des Lacs et Châteaux runs 165 km through Belgium. +1,058 ft gain and -1,087 ft loss. Surfaces skew 75% trail / 20% dirt road / 5% paved. Forest trails, rolling cols, and weather swings. High point near 289 ft. Low near 227 ft. May temps run 40°F to 80°F. The course rewards patience early and punishes rushed descents after mile 51.
The Work
Train for 1,058 feet of climbing across 165 km. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 40 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 5/10. Build a block that simulates the crux near mile 67.
Kit
May in Belgium: plan for 40°F to 80°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 40 hours pushes past dark. Poles help on sustained climbs above mile 26. Vest capacity for 2 liters minimum. Shoes matched to 75% trail: lugs for mud, rock plate if the course turns technical after mile 51.
Race Day
Hold effort through mile 26. The field often splits on the first big climb after mile 51. Forest trails, rolling cols, and weather swings near mile 67 is where time is won or lost. Walk the steep pinches. Run the flats and gentle downhills. Crew at major aids: socks, calories, ice if hot. Transitions under 5 minutes when possible. Final third is 34 miles of fatigue management. Finish with reserve for the last descent.
Official siteBack to racesPredict your timeTrain for this raceCheck readinessFoot care plan