Race Time Predictor
How fast will you run MaXi-Race 100K?
MaXi-Race 100K race stats pre-loaded (98.59 km, 5,861 m D+). Enter a known race result to get an elevation-adjusted finish time estimate.
98.59km5,861m D+Winner: ~9h48Cutoff: 24h
Full MaXi-Race tOur du Lac Solo course data: aid stations, cutoffs, course profile
- ✓Your race (done)
- 2About you
- 3Your finish
1Your race
- The course
98.6 km, but it costs 187 km-effort. The 5,861 m of climbing sets the pace.
2How should we estimate you?
Start with
Pick whichever you have. After your first estimate we ask for the other - two inputs give a firmer read.
Same as gain. Edit if different.
Hours, or h:mm
- TrailMath
Got a UTMB index? Hand it over, it's the straightest read I get. No index? A long, hilly past race works too.
3 · Your predicted finish
157 km-effort (ITRA, gain only)187 km-effort
Add a past race or your index to get a finish time.
MaXi-Race 100K finish times by UTMB Index
Predicted finish on the MaXi-Race 100K course (98.6 km, 5,861 m D+) for each UTMB Index, with the margin to the 24h00 cutoff.
| UTMB Index | Predicted finish | Average pace | Margin to cutoff |
|---|---|---|---|
| 850 | 11h17 | 6:52 /km11:03 /mi | +12h43 |
| 800 | 12h20 | 7:30 /km12:04 /mi | +11h40 |
| 750 | 13h29 | 8:12 /km13:12 /mi | +10h31 |
| 700competitive | 14h44 | 8:58 /km14:26 /mi | +9h16 |
| 650 | 16h06 | 9:48 /km15:46 /mi | +7h54 |
| 600 | 17h36 | 10:43 /km17:14 /mi | +6h24 |
| 550 | 19h14 | 11:43 /km18:51 /mi | +4h46 |
| 500mid-pack | 21h02 | 12:48 /km20:36 /mi | +2h58 |
| 450 | 22h59 | 13:59 /km22:31 /mi | +1h01 |
| 400back of the pack | 25h08 | 15:18 /km24:37 /mi | 1h08 past the cutoff |
| 350 | 27h28 | 16:43 /km26:54 /mi | 3h28 past the cutoff |
| 300 | 30h01 | 18:16 /km29:24 /mi | 6h01 past the cutoff |
The 24h00 cutoff sits at about Index 426. The typical winning time, 9h48, sits at about Index 929. At the 2026 edition, the median of the 1,418 finishers took 18h15, about Index 580. A model estimate, not an official ITRA or UTMB figure.
From a result you already have
What the predictor gives on MaXi-Race 100K for a few common reference results.
| Road marathon | 3h00 → 18h31 | 3h30 → 21h36 | 4h00 → 24h41 | 4h30 → 27h46 |
|---|---|---|---|---|
| 50 km trail, 2,000 m D+ | 5h30 → 15h31 | 6h30 → 18h20 | 7h30 → 21h09 | 8h30 → 23h57 |
Road marathons use the tool's rougher power-law fallback.
To prepare each checkpoint, use the MaXi-Race 100K aid station planner.
MaXi-Race 100K course in numbers
- Climbing per kmClimbing per mile
- 59 m314 ft
- ITRA km-effort
- 157 (100K)
- Highest point
- 1,847 m6,060 ft
- Biggest climb
- +1,313 m over 7.9 km at 16.3%+4,308 ft over 4.9 mi at 16.3%
- Steepest climb
- +641 m over 2.9 km at 22.4%+2,103 ft over 1.8 mi at 22.4%
- Longest descent
- -889 m over 10.6 km at 7.1%-2,917 ft over 6.6 mi at 7.1%
- Track climbing above 3%
- 41%
- Winning time / cutoff
- 9h48 / 24h00 (2.4x the winner's time)
Section-by-section climbs, descents and grades are on the MaXi-Race 100K course page.
Predict your MaXi-Race 100K finish time from a reference race result, adjusted for the course's 98.59 km and roughly 5,861 m of elevation gain. The overall cutoff is 24h.
About MaXi-Race tOur du Lac Solo
MaXi-Race tOur du Lac Solo covers 98.59 km with around 5,861 m of elevation gain, starting in Annecy, France. The overall cutoff is 24 hours.
Crew access is allowed at Base vie Doussard (in) (44.93 km), Base vie Doussard (out) (45.33 km), Base vie Semnoz (in) (83.38 km) and Base vie Semnoz (out) (83.7 km). Drop bags are available at Base vie Doussard (in), Base vie Doussard (out), Base vie Semnoz (in) and Base vie Semnoz (out).
Checkpoint data approximate - verify against the current official race guide at maxi-race.org before your race.
How the prediction works
Your result becomes a UTMB Index, mapped onto MaXi-Race 100K by the calibrated model behind the ITRA / UTMB Index Estimator. Full methodology.
Build a training plan targeted at your MaXi-Race 100K goal time
TrailMath uses these models to build periodized plans adjusted to your goals and terrain.
Build my plan