Races
Gran Trail Courmayeur
Italy, July. Alpine trails. 100 km. Cutoff 28 hours. The cols come whether you are ready or not.
63 mi+13,498 ft-14,899 ft28 hours2,493 ft to 3,894 fttech 6/10Checkpoints per race bookWSER qualifierJulyRunning Stones · 3 stones
Distance63 mi
Gain+13,498 ft
Loss-14,899 ft
Altitude2,493 ft to 3,894 ft
Technicality6/10
Air32°F to 75°F
- Start3,894 ft
- High3,894 ft
- Low2,493 ft
- Finish2,493 ft
Geometryderived
Steepest drop1,240 ft-10.6% over 2.2 mi
Night miles14 misunset near 20:00 local
Weather at the cruxderived
At hour 7 of race, feels like 34 C (91 F).Sample of 7 race days, medium confidence.At hour 7 of race, apparent temperature P90 is 34 C / 94 F.
The cruxHigh cols above 2,400 m and long stone descents (near mile 40)
Course DNA
The Course
Gran Trail Courmayeur runs 100 km through Italy. +13,498 ft gain and -14,899 ft loss. Surfaces skew 75% trail / 20% dirt road / 5% paved. High cols above 2,400 m and long stone descents. High point near 3,894 ft. Low near 2,493 ft. July temps run 32°F to 75°F. The course rewards patience early and punishes rushed descents after mile 31.
The Work
Train for 13,498 feet of climbing across 100 km. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 28 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 6/10. Build a block that simulates the crux near mile 40.
Kit
July in Italy: plan for 32°F to 75°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 28 hours pushes past dark. Poles help on sustained climbs above mile 16. Vest capacity for 2 liters minimum. Shoes matched to 75% trail: lugs for mud, rock plate if the course turns technical after mile 31.
Race Day
Hold effort through mile 16. The field often splits on the first big climb after mile 31. High cols above 2,400 m and long stone descents near mile 40 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 21 miles of fatigue management. Finish with reserve for the last descent.
Results
Gran Trail Courmayeur finish lines.
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Sources (1)
- Qualifier: utmb_stones: https://utmb.world/utmb-world-series