Race Time Predictor
How fast will you run EcoTrail Paris 80?
EcoTrail Paris 80 race stats pre-loaded (81.8 km, 1,320 m D+). Enter a known race result to get an elevation-adjusted finish time estimate.
81.8km1,320m D+Winner: ~5h39Cutoff: 13h40
Full EcoTrail Paris - Trail 80 km course data: aid stations, cutoffs, course profile
- ✓Your race (done)
- 2About you
- 3Your finish
1Your race
- The course
81.8 km, but it costs 102 km-effort. The 1,457 m of descent is where legs go.
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
95 km-effort (ITRA, gain only)102 km-effort
Add a past race or your index to get a finish time.
EcoTrail Paris 80 finish times by UTMB Index
Predicted finish on the EcoTrail Paris 80 course (81.8 km, 1,320 m D+) for each UTMB Index, with the margin to the 13h40 cutoff.
| UTMB Index | Predicted finish | Average pace | Margin to cutoff |
|---|---|---|---|
| 850 | 5h22 | 3:56 /km6:20 /mi | +8h19 |
| 800 | 5h52 | 4:18 /km6:55 /mi | +7h49 |
| 750 | 6h24 | 4:42 /km7:34 /mi | +7h16 |
| 700competitive | 7h00 | 5:08 /km8:16 /mi | +6h40 |
| 650 | 7h39 | 5:37 /km9:02 /mi | +6h01 |
| 600 | 8h22 | 6:08 /km9:52 /mi | +5h18 |
| 550 | 9h09 | 6:42 /km10:48 /mi | +4h32 |
| 500mid-pack | 10h00 | 7:20 /km11:48 /mi | +3h40 |
| 450 | 10h56 | 8:01 /km12:54 /mi | +2h45 |
| 400back of the pack | 11h57 | 8:46 /km14:06 /mi | +1h44 |
| 350 | 13h03 | 9:35 /km15:25 /mi | +0h37 |
| 300 | 14h16 | 10:28 /km16:51 /mi | 0h36 past the cutoff |
The 13h40 cutoff sits at about Index 324. The typical winning time, 5h39, sits at about Index 820. At the 2026 edition, the median of the 2,451 finishers took 10h21, about Index 481. A model estimate, not an official ITRA or UTMB figure.
From a result you already have
What the predictor gives on EcoTrail Paris 80 for a few common reference results.
| Road marathon | 3h00 → 8h52 | 3h30 → 10h21 | 4h00 → 11h50 | 4h30 → 13h19 |
|---|---|---|---|---|
| 50 km trail, 2,000 m D+ | 5h30 → 7h22 | 6h30 → 8h43 | 7h30 → 10h03 | 8h30 → 11h23 |
Road marathons use the tool's rougher power-law fallback.
To prepare each checkpoint, use the EcoTrail Paris 80 aid station planner.
EcoTrail Paris 80 course in numbers
- Climbing per kmClimbing per mile
- 16 m85 ft
- ITRA km-effort
- 95 (50K)
- Highest point
- 232 m761 ft
- Biggest climb
- +110 m over 6.0 km at 1.2% (through Meudon - Marcel Bec)+361 ft over 3.7 mi at 1.2% (through Meudon - Marcel Bec)
- Steepest climb
- +63 m over 0.5 km at 12.7%+207 ft over 0.3 mi at 12.7%
- Longest descent
- -62 m over 6.8 km at 0.5%-203 ft over 4.2 mi at 0.5%
- Track climbing above 3%
- 16%
- Winning time / cutoff
- 5h39 / 13h40 (2.4x the winner's time)
Section-by-section climbs, descents and grades are on the EcoTrail Paris 80 course page.
Predict your EcoTrail Paris 80 finish time from a reference race result, adjusted for the course's 81.8 km and roughly 1,320 m of elevation gain. The overall cutoff is 13h40.
About EcoTrail Paris - Trail 80 km
EcoTrail Paris - Trail 80 km covers 81.8 km with around 1,320 m of elevation gain, starting in Colline d'Élancourt, Élancourt, France. The overall cutoff is 13 hours 40 minutes.
Crew access is allowed at Buc - Château (25.1 km), Chaville - Stade Jean-Jaurès (37.7 km), Meudon - Marcel Bec (53.6 km) and Saint-Cloud - Manufacture (72.3 km).
Checkpoint data approximate - verify against the current official race guide at ecotrailparis.com before your race.
How the prediction works
Your result becomes a UTMB Index, mapped onto EcoTrail Paris 80 by the calibrated model behind the ITRA / UTMB Index Estimator. Full methodology.
Build a training plan targeted at your EcoTrail Paris 80 goal time
TrailMath uses these models to build periodized plans adjusted to your goals and terrain.
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