GTC100 Aid Station Planner
All 15 GTC100 checkpoints pre-loaded. Prepare your inputs here, then unlock your complete roadbook in the app.
Full Gran Trail Courmayeur - GTC100 course data: aid stations, cutoffs, course profile
Prepare your GTC100 goal and checkpoints across 103 km and around 7,400 m of climbing. The public example is fixed; your complete personalized roadbook opens in the app.
Your start date and time travel with your inputs to the app.
Checkpoints (15)
Cutoff Sat 01:00
Cutoff Sat 09:30
Cutoff Sat 15:30
Cutoff Sat 19:00
Cutoff Sat 21:30
Cutoff Sun 02:00
Cutoff Sun 05:30
Cutoff Sun 07:00
A fixed roadbook example
Example only: a 10 km section with 500 m of climbing, 300 m of descent and a 90-minute budget. This is not a prediction for your race.
- Dist (km)
- 10 km
- Section time
- 1:30
- Planned average pace
- 9:00 / km
Unlock the complete saved roadbook in the app: checkpoint times, pacing, fueling and a printable crew card. Public course facts remain available here.
Stops are not separately modeled. The app works out your splits with its own course model.
Add your race start date and time to save this plan.
GTC100 course in numbers
- Climbing per kmClimbing per mile
- 72 m379 ft
- ITRA km-effort
- 177 (100M)
- Highest point
- 2,830 m9,285 ft
- Biggest climb
- +1,507 m over 11.6 km at 12.1% (through Youlaz)+4,944 ft over 7.2 mi at 12.1% (through Youlaz)
- Steepest climb
- +810 m over 3.3 km at 23.6% (Brenva to Skyway Pavillon du Mont Fréty (life base))+2,657 ft over 2.1 mi at 23.6% (Brenva to Skyway Pavillon du Mont Fréty (life base))
- Longest descent
- -1,198 m over 10.5 km at 10.1% (through La Thuile)-3,930 ft over 6.5 mi at 10.1% (through La Thuile)
- Track climbing above 3%
- 44%
- Winning time / cutoff
- 15h20 / 33h00 (2.2x the winner's time)
Section-by-section climbs, descents and grades are on the GTC100 course page.
About Gran Trail Courmayeur - GTC100
Gran Trail Courmayeur - GTC100 covers 103 km with around 7,400 m of elevation gain, starting in Courmayeur, Valle d'Aosta, Italy. The overall cutoff is 33 hours.
Crew access is allowed at Arpy (12.67 km), Rifugio Deffeyes (24.78 km), La Thuile (34.18 km), Youlaz (40.42 km), Mont Fortin (49.95 km), Lago Combal (61.4 km), Rifugio Maison Vieille (70.06 km), Skyway Pavillon du Mont Fréty (life base) (78.02 km), Rifugio Bonatti (89.87 km) and Currù (97.26 km). Drop bags are available at Skyway Pavillon du Mont Fréty (life base).
Checkpoint data approximate - verify against the current official race guide at gtcourmayeur.com before your race.
How the splits are allocated
Your goal time is split across the GTC100 legs by km-effort: distance + gain/100 + loss/200. Full methodology.
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