GTC55 Aid Station Planner
All 8 GTC55 checkpoints pre-loaded. Prepare your inputs here, then unlock your complete roadbook in the app.
Full Gran Trail Courmayeur - GTC55 course data: aid stations, cutoffs, course profile
Prepare your GTC55 goal and checkpoints across 53.3 km and around 3,500 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 (8)
Cutoff Sat 11:00
Cutoff Sat 17:00
Cutoff Sun 01:00
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.
GTC55 course in numbers
- Climbing per kmClimbing per mile
- 66 m347 ft
- ITRA km-effort
- 88 (50K)
- Highest point
- 2,830 m9,285 ft
- Biggest climb
- +1,079 m over 5.9 km at 18.0%+3,540 ft over 3.7 mi at 18.0%
- Steepest climb
- +154 m over 0.4 km at 27.7%+505 ft over 0.2 mi at 27.7%
- Longest descent
- -1,322 m over 13.1 km at 9.2% (down to Courmayeur (Finish))-4,337 ft over 8.1 mi at 9.2% (down to Courmayeur (Finish))
- Track climbing above 3%
- 39%
- Winning time / cutoff
- 5h29 / 18h00 (3.3x the winner's time)
Section-by-section climbs, descents and grades are on the GTC55 course page.
About Gran Trail Courmayeur - GTC55
Gran Trail Courmayeur - GTC55 covers 53.3 km with around 3,500 m of elevation gain, starting in Courmayeur, Valle d'Aosta, Italy. The overall cutoff is 18 hours.
Crew access is allowed at Youlaz (15.12 km), Mont Fortin (24.65 km), Lago Combal (36.1 km) and Rifugio Maison Vieille (44.66 km).
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 GTC55 legs by km-effort: distance + gain/100 + loss/200. Full methodology.
Build a training plan for GTC55
TrailMath uses these models to build periodized plans adjusted to your goals and terrain.
Build my plan